Darwin Blanch, 18, rallied from a set down Sunday, Sept. 20, to win the Tiburon Challenger at the Tiburon Peninsula Club.

The Florida teen beat No. 4 seed Michael Mmoh 3-6, 6-4, 6-2 in the final, becoming the youngest champion in the tournament's 18-year history, as first reported by The Ark. He is also the youngest American to win an ATP Challenger 125-level event since that tier was created in 2019, according to ATP Tour.

The win capped a wild week. Blanch saved five match points against Stefan Kozlov in the opening round, then ran through Federico Gomez, Bryce Nakashima and defending champion Michael Zheng before toppling Mmoh. He arrived in Tiburon on an eight-match losing streak dating to July.

Blanch told ATP Tour that the slump shook his confidence. "I had seven first-round [losses] in a row, which I don't think I've ever had in my career … it's kind of tough because you doubt yourself, you don't have much confidence, but I feel like I'm finding my groove again," he said.

The title pushed Blanch to a career-high No. 166 in the ATP rankings and moved him to sixth in the Next Gen Race. He turns 19 on Sept. 28. Blanch joins Learner Tien and Alex Michelsen as the only Americans aged 18 or under to win a Challenger title in the past 10 years and is the seventh consecutive American champion at Tiburon. Mmoh, the 2018 Tiburon winner, fell short of a second title.

Bigger stage for the tournament

The 18th annual Tiburon Challenger ran Sept. 13-20 with a $230,000 purse, more than double the previous year's. The upgrade to ATP 125 status brought live Tennis Channel coverage of the Saturday and Sunday finals for the first time.

More than 360 volunteers kept the event running. Tournament coordinator Jane Colwell told the Redwood Bark that pre-planning begins each November, with her role covering player housing, venue setup and coordination with the USTA on officials.

Stacey Crawford, a local parent and one of 14 core volunteers, organized and trained ball persons ranging in age from 10 to 70. Among them was Declan Grey, a sophomore varsity tennis player at Redwood High School who has volunteered as a ball person since age 9. Grey holds Level A status, meaning he is trained to work center court.

"Watching their matches firsthand and getting to interact with the players is awesome," Grey told the Redwood Bark. "It inspires me to work hard on my skills."

Blanch's next target is qualifying for the Next Gen ATP Finals, a 20-and-under event in Reggio Calabria, Italy, Dec. 9-13.