{"id":622802,"date":"2026-05-04T11:44:12","date_gmt":"2026-05-04T11:44:12","guid":{"rendered":"https:\/\/www.newsbeep.com\/us\/622802\/"},"modified":"2026-05-04T11:44:12","modified_gmt":"2026-05-04T11:44:12","slug":"electronic-line-calling-on-clay-still-confuses-tennis-players-and-fans-but-is-it-the-issue","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us\/622802\/","title":{"rendered":"Electronic line calling on clay still confuses tennis players and fans. But is it the issue?"},"content":{"rendered":"<p>Welcome back to the Monday Tennis Briefing, where The Athletic\u00a0will explain the stories behind the stories from the past week on court.<\/p>\n<p>This week, electronic line calling once again caused chaos on clay, a strange Madrid Open provided winning memories, and the wearable-tech arms race evolved.<\/p>\n<p>If you\u2019d like to follow our fantastic tennis coverage, <a class=\"c-link\" href=\"https:\/\/www.nytimes.com\/athletic\/tennis\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-stringify-link=\"https:\/\/theathletic.com\/tennis\/\" data-sk=\"tooltip_parent\">click here<\/a>.<\/p>\n<p>Did arguments over electronic line calling actually represent a step forward?<\/p>\n<p>The <a href=\"https:\/\/www.nytimes.com\/athletic\/6320584\/2026\/04\/27\/tennis-electronic-line-calling-clay-ball-marks-umpires\/\" rel=\"nofollow noopener\" target=\"_blank\">electronic line calling<\/a> (ELC) system is the letter of the law across top-tier tennis these days, but that didn\u2019t stop an old stalwart of clay-court season from cropping up at the <a href=\"https:\/\/www.nytimes.com\/athletic\/7250169\/2026\/05\/03\/tennis-sinner-zverev-madrid-open-masters-1000-title-record\/\" rel=\"nofollow noopener\" target=\"_blank\">Madrid Open<\/a>: Players arguing with umpires over ball marks.<\/p>\n<p>Alexander Zverev, Mirra Andreeva and Elena Rybakina all asked a chair umpire to come down and check a physical ball mark they believed to prove a shot which the ELC system had called in was actually out.<\/p>\n<p>Umpires declined to check the traces each time.<\/p>\n<p>\u201cThis is a joke. The system is wrong. This is not a joke. There is no such mark which is shown on the TV,\u201d Rybakina said, imploring umpire Julie Kjendlie to come down from her chair during her second-round match against Zheng Qinwen.<\/p>\n<p>\u201cThat\u2019s what I have to go with. Now that we have live ELC, that\u2019s what we have to go with,\u201d Kjendlie said.<\/p>\n<p>Since ELC was widely adopted at clay events on the ATP and WTA Tours last year, players have been educated on the fact that ball marks on the surface can be deceiving. The tours collaborated on a video explaining the discrepancies between the system it uses and the ball marks on the surface, which have been reiterated in other communication channels.<\/p>\n<p>Clay is affected by environmental conditions, as well as how much red brick-dust happens to be on a certain part of the court at a certain time, and those conditions change from point to point as players slide and move around the court. A ball that lands in can leave a mark outside of the line; a ball that lands out can leave a mark that appears as if it has caught.<\/p>\n<p>It was Andreeva\u2019s disagreement that was most illuminating. \u201cI understand that you cannot overrule. But as players, what do we do?\u201d she asked chair umpire Kader Nouni.<\/p>\n<p>The players are still learning to trust the electronic system, after being told last year that the way they\u2019ve been calling balls on clay their entire lives no longer applies. There is also the possibility that players know the system is correct but sometimes, in the heat of competition, feel that their best course of action is to start an argument with the umpire.<\/p>\n<p>There are other things the sport could do for fans, too. Broadcasters explain the system infrequently and commentators sometimes appear caught out during confrontations, while the top-down replays used during matches arguably make the situation worse. They reproduce the perspective of the confused player looking down at the court, not the system checking whether or not the ball has made contact with the line.<\/p>\n<p>What instances like those involving Zverev, Andreeva and Rybakina in Madrid also prove is how counterproductive the upcoming French Open\u2019s decision to eschew ELC and continue using the physical traces of the ball is.<\/p>\n<p>The tours have asked players to shift their mindsets about ball marks on clay, while the French Open, the only Grand Slam that hasn\u2019t adopted the electronic system, asks them to revert for a few weeks every year.<\/p>\n<p>That\u2019s not good for a system that requires some amount of buy-in on clay, and it complicates things for viewers. The French Open is muddy enough already without it.<\/p>\n<p style=\"text-align: right;\">\u2014 Ava Wallace<\/p>\n<p>How did a funky tournament provide some winning memories?<\/p>\n<p>For those sweating at the thought of a <a href=\"https:\/\/www.nytimes.com\/athletic\/7246724\/2026\/05\/02\/tennis-grand-slams-prize-money-player-pressure\/\" rel=\"nofollow noopener\" target=\"_blank\">French Open<\/a> this year without the <a href=\"https:\/\/www.nytimes.com\/athletic\/7226217\/2026\/04\/24\/tennis-jannik-sinner-carlos-alcaraz-french-open\/\" rel=\"nofollow noopener\" target=\"_blank\">Jannik Sinner-Carlos Alcaraz rivalry<\/a> to ballast the men\u2019s draw, the Madrid Open provided a delightful counterargument.<\/p>\n<p>Between 23 withdrawals \u2014 including Alcaraz, who has announced his 2026 clay-court season is over due to a wrist injury \u2014 a viral stomach bug and a slew of early-round upsets of top players, this tournament should have been a mess.<\/p>\n<p>But the tennis prevailed. When I think of this Madrid Open in the future, I\u2019ll think of <a href=\"https:\/\/www.nytimes.com\/athletic\/7238159\/2026\/04\/28\/tennis-baptiste-sabalenka-madrid-open\/\" rel=\"nofollow noopener\" target=\"_blank\">Hailey Baptiste<\/a>, first executing, in a fourth-round win against Belinda Bencic, perhaps the most artful <a href=\"https:\/\/www.nytimes.com\/athletic\/5613787\/2026\/04\/08\/tennis-racket-smash-penalty-danger\/\" rel=\"nofollow noopener\" target=\"_blank\">racket smash<\/a> I\u2019ve ever seen, then playing the match of her life to defeat Aryna Sabalenka in the quarterfinals.<\/p>\n<p>Baptiste is no newbie on tour, but the first sustained look at her prowess on clay came during a tantalizing run to the fourth round at Roland Garros last year. She made good on that promise against world No. 1 Sabalenka in Madrid, unloading her abundant toolkit and playing the kind of courageous tennis that made it hard to stay seated on the couch while watching at home.<\/p>\n<p>There was more from players ranked outside of the top 10: Frenchman <a href=\"https:\/\/www.nytimes.com\/athletic\/7110180\/2026\/03\/26\/tennis-arthur-fils-injury-comeback\/\" rel=\"nofollow noopener\" target=\"_blank\">Arthur Fils<\/a> rattled off an impressive run to the semifinals, meaning the worst he\u2019s done in his first four tournaments after returning from a stress fracture in his lower back is the last eight in Indian Wells.<\/p>\n<p><a href=\"https:\/\/www.nytimes.com\/athletic\/7244096\/2026\/05\/01\/tennis-alexander-blockx-madrid-open\/\" rel=\"nofollow noopener\" target=\"_blank\">Alexander Blockx<\/a>, 21, started the tournament ranked No. 69, took out four seeded players with his brawny game and outlasted 19-year-olds Rafael J\u00f3dar and Jo\u00e3o Fonseca in the draw to be the last youngster standing before losing to Zverev in the semifinals.<\/p>\n<p>World No. 23 <a href=\"https:\/\/www.nytimes.com\/athletic\/7245532\/2026\/05\/01\/tennis-marta-kostyuk-ukraine-madrid-open\/\" rel=\"nofollow noopener\" target=\"_blank\">Marta Kostyuk<\/a> prevailed to win the biggest title of her career against Andreeva in a rare final between two players coached by women: Andreeva\u2019s Conchita Mart\u00ednez and Kostyuk\u2019s Sandra Zaniewska.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-7251999 size-full\" src=\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2026\/05\/Marta-Kostyuk-Tennis-Backflip-scaled.jpg\" alt=\"Marta Kostyuk does a backflip on a clay tennis court.\" width=\"2560\" height=\"1563\"  \/><\/p>\n<p>\n      Marta Kostyuk celebrated her Madrid Open title with a backflip. (Clive Brunskill \/ Getty Images)<\/p>\n<p>It wasn\u2019t the final match of the tournament, but Kostyuk pulling off a back handspring after winning the trophy summed up a Madrid Open which could have been a strange letdown: It was unexpected, and full of joy.<\/p>\n<p style=\"text-align: right;\">\u2014 Ava Wallace<\/p>\n<p>What now for the wearables arms race in tennis?<\/p>\n<p>A couple of weeks after the news that <a href=\"https:\/\/www.nytimes.com\/athletic\/7204495\/2026\/04\/20\/tennis-grand-slams-wearable-technology-rules\/\" rel=\"nofollow noopener\" target=\"_blank\">tennis players can use approved wearables at the three remaining Grand Slams<\/a> of 2026 on a trial basis, the U.S. Open went a step further.<\/p>\n<p>On Thursday, the United States Tennis Association (USTA) announced a five-year partnership with Oura, the company known for a ring that tracks metrics including sleep, heart rate and stress. A news release from the USTA said that Oura would become \u201can official sponsor and wearable fitness device partner of the U.S. Open, USTA and USTA Coaching\u201d.<\/p>\n<p>Oura rings will be available to every player in the U.S. Open main draws and will be integrated across a number of USTA platforms, including coaching programs and internal leagues. Oura will also become a founding partner of the U.S. Open\u2019s Player Performance Center \u2014 a new hub for players to assess their health and performance during the tournament, which is part of the <a href=\"https:\/\/www.nytimes.com\/athletic\/6368092\/2025\/05\/19\/tennis-us-open-stadiums-venue-renovation\/\" rel=\"nofollow noopener\" target=\"_blank\">$800 million renovation of its Arthur Ashe Stadium<\/a> due to be completed in 2027.<\/p>\n<p>At January\u2019s Australian Open, Sabalenka, Alcaraz and Sinner were all asked to remove bracelets made by another wearable company, Whoop, ahead of matches. The bands, which track biometric data including heart-rate variability, skin temperature and blood oxygen, were not approved by the tournament, despite the men\u2019s and women\u2019s tours and the International Tennis Federation (ITF), whose rulebook the majors follow, permitting them.<\/p>\n<p>The four Grand Slams can individually decide which wearables can and can\u2019t be used, irrespective of the ITF\u2019s list. Tennis Australia did not let players use the Whoop bands, which are on the ITF list; the U.S. Open has now approved these Oura rings, but they are not yet on the ITF list. Two people with knowledge of the approvals process, who were not authorized to speak publicly about it because it is confidential, said that Oura is in the process of obtaining ITF approval.<\/p>\n<p>A more liberal approach to wearables will be well received by players after their criticism of the Australian Open\u2019s approach in January. Sabalenka, who is a Whoop ambassador, argued that they should have access to their own health data.<\/p>\n<p>\u201cThere is certain data that we would like to track a little bit on court. It\u2019s not for the live thing,\u201d Sinner said at the Australian Open, countering the idea that wearables offer a tactical advantage during play. \u201cIt\u2019s more about what you can see after the match. This is data that we would like to use also in practice sessions.\u201d<\/p>\n<p>The NBA, NFL, MLB, WNBA and professional golf all permit wearable technology in some capacity. In tennis, the information provided by wearables is key for players, coaches and federations, including Britain\u2019s Lawn Tennis Association, for managing performance aspects such as load management and injury prevention.<\/p>\n<p>The USTA hopes the Oura rings will aid elements such as training and recovery. During the Australian Open, the Professional Tennis Players\u2019 Association medical director, Dr Robby Sikka, said that \u201cother major sports leagues have already built thoughtful, evidence-based frameworks for wearable technology\u201d in a text message.<\/p>\n<p>\u201cThe NFL allows approved wearables and tracking, the NBA operates a formal wearables committee with full player access to their data, MLB rigorously vets devices, and global soccer leagues have multiple approved systems in place. Tennis should meet that same standard.\u201d<\/p>\n<p>The U.S. Open\u2019s Oura partnership, and the more laissez-faire approach to wearables at the French Open and Wimbledon this year, suggest tennis is starting to catch up.<\/p>\n<p style=\"text-align: right;\">\u2014 Charlie Eccleshare<\/p>\n<p>Shot of the week<\/p>\n<p>Any one of Baptiste\u2019s best strokes during her win over Sabalenka could have made the cut, but this drop shot\/lob combination to save match point was particularly special:<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-7250628 size-full\" src=\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2026\/05\/Untitled-ezgif.com-video-to-gif-converter.gif\" alt=\"\" width=\"800\" height=\"448\"\/>\ud83c\udfc6\u00a0The winners of the week<\/p>\n<p>\ud83c\udfbe\u00a0ATP:\u00a0<\/p>\n<p>\ud83c\udfc6 Jannik Sinner (1) def. Alexander Zverev (2) 6-1, 6-2 to win the Madrid Open (1,000) in Madrid. It is his fifth consecutive ATP Masters 1000 title.<\/p>\n<p>\ud83c\udfbe WTA:<\/p>\n<p>\ud83c\udfc6 Marta Kostyuk (26) def. Mirra Andreeva (9) 6-3, 7-5 to win the Madrid Open (1,000) in Madrid. It is her first WTA 1000 title.<\/p>\n<p>\ud83d\udcc8\ud83d\udcc9 On the rise \/ Down the line<\/p>\n<p>\ud83d\udcc8 Marta Kostyuk moves up eight places from No. 23 to No. 15 after her Madrid Open win.<br \/>\ud83d\udcc8 Alexander Blockx ascends 33 spots from No. 69 to No. 36 after his run to the Madrid Open semifinals.<br \/>\ud83d\udcc8 Hailey Baptiste rises seven spots from No. 32 to No. 25, a new career high.<br \/>\ud83d\udcc8 Arthur Fils rises eight spots from No. 25 to No. 17.<\/p>\n<p>\ud83d\udcc9 Jack Draper falls 22 places from No. 28 to No. 50.<br \/>\ud83d\udcc9 Donna Veki\u0107 drops 23 places from No. 66 to No. 89.<br \/>\ud83d\udcc9 Casper Ruud leaves the top 20, tumbling 10 spots from No. 15 to No. 25.<br \/>\ud83d\udcc9 Emma Navarro leaves the top 30, moving down six spots from No. 28 to No. 34.<\/p>\n<p>\ud83d\udcc5 Coming up<\/p>\n<p>\ud83c\udfbe\u00a0ATP\u00a0<\/p>\n<p>\ud83d\udccdRome: Italian Open (1,000) featuring Jannik Sinner, Alexander Zverev, Jo\u00e3o Fonseca, Rafael J\u00f3dar.<\/p>\n<p>\ud83d\udcfa UK: Sky Sports; U.S.: Tennis Channel \ud83d\udcbb Tennis TV<\/p>\n<p>\ud83c\udfbe WTA<\/p>\n<p>\ud83d\udccdRome: Italian Open (1,000) featuring Aryna Sabalenka, Elena Rybakina, Iga \u015awi\u0105tek, Coco Gauff.<\/p>\n<p>\ud83d\udcfa UK: Sky Sports; U.S.: Tennis Channel<\/p>\n<p>Tell us what you noticed this week in the comments below as the men\u2019s and women\u2019s tours continue.<\/p>\n","protected":false},"excerpt":{"rendered":"Welcome back to the Monday Tennis Briefing, where The Athletic\u00a0will explain the stories behind the stories from the&hellip;\n","protected":false},"author":2,"featured_media":622803,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[72],"tags":[99,1794,428],"class_list":["post-622802","post","type-post","status-publish","format-standard","has-post-thumbnail","category-tennis","tag-sports","tag-sports-business","tag-tennis"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/622802","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/comments?post=622802"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/622802\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media\/622803"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media?parent=622802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/categories?post=622802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/tags?post=622802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}