Welcome to the wacky world of a ATP Challenger 75 men’s tennis tournament, San Diego style.

Over the last six years, the Barnes Tennis Center started with a ATP 250 tourney, scaled down to the current Challenger 100 in January and then added the Challenger 75 named the Tennis Warehouse Open.

As a tournament’s ranking points go down, unpredictability seems to go up.

The semifinals included three unseeded players, including a qualifier, along with No. 1 Nishesh Basavareddy.

The Newport Beach resident then completed an uneven path of his own to take the title over Brazil’s Igor Marcondes 7-5, 6-4 in Sunday’s final.

“It’s been an up-and-down week,” said Basavareddy, 21, ranked No. 167. “I’ve been broken (on serve) and have broken back. But it also gave me confidence that I could come back.”

It was the fourth career Challenger title and second of the year for Basavareddy, who reached a career-high No. 99 a year ago. The Stanford alum also had a highlight this year when he beat No. 10 Taylor Fritz, a San Diego native, in the opening round of the French Open.

Sunday’s title came with a $17,000 payday from a $107,000 prize purse.

As much as the play, the final may be remembered for wardrobe issues. Basavareddy changed shirts about eight times overall during breaks, and both players switched outfits between sets.

Into the second set, facing a 2-1 deficit, Basavareddy used the break to not only change his shirt, but also adjust his shoes, socks and an ankle wrap for a prolonged delay that led to a serve penalty.

In a following exchange with ATP Supervisor Keith Copeland, Basavareddy proclaimed, “Outrageous, man! Why are you here?”

Since he’s prone to sweating, Basavareddy said that he carries 12-14 shirts with him for a match.

“It’s unfortunate that they made that decision,” Basavareddy said. “If I keep sweating, it can affect the court. It’s something that I’ll have to deal with in the future.”

Basavareddy split the next two games before going on a 4-1 surge to take the title.

Marcondes, 29, ranked 324th, showed progress in his second year of a comeback after serving a three-year suspension for violations of the International Tennis Federation’s anti-doping test policy.

In the semifinals, Basavareddy outlasted Dylan Dietrich, ranked No. 409, from Switzerland 6-7, 6-4, 5-1 (ret.) in 2 hours, 56 minutes for an 8:30 p.m. finish on the eve of the final.

“Normally, you expect to see the seeded players do better,” Basavareddy said. “But everyone at this is a great player, so that makes it tough.”