The Tiburon Challenger will carry a $230,000 purse and ATP 125 status when it returns to the Tiburon Peninsula Club Sept. 13–20.

The prize money is more than double last year's $100,000, and the tournament has jumped from the ATP Challenger Tour's 75 level to its 125 tier. Now in its 18th year, the event is the largest professional tennis tournament in Northern California and the second largest on the West Coast, according to the tournament's organizing committee.

The higher ranking and bigger purse should attract stronger fields. The tournament falls right after the U.S. Open, and organizers expect players heading to the Asian swing to stop in Tiburon on the way.

The 2026 draw includes 32 players in the singles main draw, 24 in singles qualifying and 16 doubles pairs. All three main courts will use electronic line calling for the first time, with dozens of cameras making official calls.

Past Tiburon Challenger competitors have reached the top of the ATP Tour. Tommy Paul won the singles title in 2019, Cameron Norrie won in 2017 and Ben Shelton was a finalist in 2022. Michael Zheng won the 2025 title, defeating Tyler Zink 6–4, 6–4.

Finals weekend, Sept. 19–20, is already sold out. The Tennis Channel will broadcast the finals live, hosted by Mike Cation and Brad Gilbert. The club will also show the matches on a large LED screen on its patio for a watch party open to members and guests.

Marin County high school varsity tennis players and their coaches are invited to a free watch party on the club's bocce lawn during finals weekend. Gilbert will interview match winners on the lawn after their matches.

On Sept. 17, a special exhibition will feature Rajeev Ram and Sam Querrey paired with two top Cal women's players in mixed doubles. Ram has won five Grand Slam doubles titles, including U.S. Open doubles titles in 2021, 2022 and 2023. Querrey reached a career-high singles ranking of No. 11 and won 10 ATP titles.

A Special Olympics exhibition is scheduled for 12:30 p.m. Sept. 19.

New this year is The Village, a social hub on the club patio with food, drinks, lawn games, lounge seating and vendor booths. The Village opens at 10 a.m. Sept. 13 and runs until 2 p.m. that day, which doubles as Kid's Day following a free children's tennis clinic that morning. It runs 3–7 p.m. Sept. 14–18, The Ark reported.

Singles qualifying begins Sept. 13. Main-draw play runs Sept. 14–18, with semifinals Sept. 19. The doubles final is set for 1 p.m. and the singles final for 3 p.m. Sept. 20.