2026 Tiburon Challenger Entry List: Martin Damm Leads Strong American Field September 12 UPDATE!

Editor’s Update 9-12-2026: Jacob Fearnley and Eliot Spizzirri are out of the Tiburon field, with Blaise Bicknell and Karue Sell taking their places.

The 2026 Tiburon Challenger entry list is loaded with American talent, with Martin Damm, Michael Zheng, Eliot Spizzirri, Nishesh Basavareddy, and Michael Mmoh among the names heading to the San Francisco Bay area.

Read on for the Tiburon Challenger Entry List, beginning Sept. 14.

2026 Tiburon Challenger Entry List

2026 Tiburon Challenger Qualifying Entry List

The entry list remains subject to change before the tournament begins.

Storylines From the Tiburon Challenger Entry List

Martin Damm Tops the Field

Martin Damm enters as the highest-ranked player in the field at No. 92.

That makes him the top player to beat in a draw packed with Americans trying to make a late-season push up the ATP rankings.

Michael Zheng and Eliot Spizzirri Keep Climbing

Michael Zheng and Eliot Spizzirri have both pushed themselves into the Top 115 and will arrive in Tiburon as two of the most dangerous players in the field.

Both have become increasingly difficult outs at the Challenger level, and this CH 125 gives them another valuable opportunity to bank ranking points.

Nishesh Basavareddy and Darwin Blanch Headline the Young Americans

Nishesh Basavareddy and Darwin Blanch add another layer of young American talent to the field.

Basavareddy is already up to No. 163, while Blanch remains one of the more intriguing long-term prospects in American tennis.

Michael Mmoh and Stefan Kozlov Bring Experience

Michael Mmoh and Stefan Kozlov have both spent plenty of time on the ATP Tour and bring different levels of experience to an otherwise young field.

Mmoh is ranked No. 173, while Kozlov will be looking to make another Challenger run from outside the Top 250.

J.J. Wolf Lands in Qualifying

One of the biggest names on the entry list is currently in qualifying.

Former World No. 39 J.J. Wolf is ranked No. 248 and will need to work his way through the qualifying draw unless his status changes before the tournament begins.

Karue Sell, Trevor Svajda, Ozan Baris, Aidan Mayo, and Kaylan Bigun are also part of a qualifying field with plenty of upside.

Phil Naessens

Phil Naessens has spent decades in sports as a broadcaster, author, journalist, professional tennis coach, and betting analyst. As the founder and editor of Crush & Rush News and host of the Crush & Rush Tennis Podcast, he combines firsthand coaching experience with years of sports media and publishing to deliver thoughtful tennis analysis, tournament coverage, player features, and transparent betting insights built around value, and not hype.