Jessica Pegula hit 63 unforced errors and suffered a shock defeat on the road to the U.S. Open.

Pegula is hoping to find some form ahead of the U.S. Open after her Wimbledon journey ended before it really began. The world No. 4 crashed out of the first round at the hands of the unseeded Elisabetta Cocciaretto, who won 6-2, 6-3.

The American’s Wimbledon hopes ended after just 58 minutes, and Pegula — the daughter of billionaire Buffalo Bills owner Terry Pegula, who  is set to inherit a superyacht — hardly fared better at the Canadian Open. Pegula defeated Maria Sakkari in the first round but struggled in the second round, falling apart in spectacular fashion after winning the first set. 

Pegula’s 11-match Canadian winning streak came to an end. The two-time champion crashed out in three sets against the No. 386-ranked Anastasija Sevastova, falling 3-6, 6-4, 6-1. 

It was a stunning three-set upset and a win that represented Sevastova’s first Top 10 win since defeating Serena Williams in the Billie Jean King Cup Qualifiers. It was also her first Top 5 win since dethroning defending champion Sloane Stephens at the 2018 U.S. Open.

The 35-year-old Sevastova clinched a career-high ranking of No. 11 in 2018, but now sits at 386th — but she rallied from a set down and broke Pegula six times on 10 chances. Pegula only has herself to blame; she tallied 63 unforced errors compared to the Latvian’s 37.

Pegula’s loss means a new women’s singles champion will be crowned at the Canadian Open. The result continues a poor run of form for the American, whose win in Montreal over Sakkari followed losses in the first rounds of Wimbledon and the D.C. Open, where she fell to Leylah Fernandez. 

Sevastova will take on Japan’s Naomi Osaka, who advanced to the fourth round with a 6-2, 6-4 win over Latvia’s Jelena Ostapenko. Osaka hit five aces and converted six of nine break point opportunities as the former world No. 1 dominated. 

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Elsewhere, Wimbledon champion Iga Swiatek — who lost to Pegula at Bad Homburg — is set to face Germany’s Eva Lys in the Round of 32 on Friday. Swiatek crushed Guo Hanyu in the opening round. 

Meanwhile, Coco Gauff is preparing to play Victoria Mboko, the only Canadian — singles or doubles — remaining in Montreal. Gauff defeated Danielle Collins and Veronika Kudermetova to secure a contest against the 18-year-old rising star on Saturday.