2025 Tiburon Challenger

The 2025 Tiburon Challenger presented by Raymond James was a professional tennis tournament played on outdoor hardcourts. It was the 17th edition of the tournament which was part of the 2025 ATP Challenger Tour. It took place in Tiburon, United States between September 29 and October 5, 2025.

• 1 Rankings are as of September 22, 2025.

The following players received wildcards into the singles main draw:

• Samir Banerjee
• Duncan Chan
• Trevor Svajda

The following player received entry into the singles main draw using a protected ranking:

• Philip Sekulic

The following player received entry into the singles main draw as a special exempt:

• Abdullah Shelbayh

The following player received entry into the singles main draw through the Next Gen Accelerator programme:

• Federico Bondioli

The following player received entry into the singles main draw as an alternate:

• Oliver Tarvet

The following players received entry from the qualifying draw:

• Bor Artnak

• Micah Braswell

• Andre Ilagan

• Daniel Masur

• Renta Tokuda

• Olle Wallin

• Michael Zheng def. Tyler Zink 6–4, 6–4.

• Finn Reynolds / James Watt def. Benjamin Kittay / Joshua Sheehy 6–2, 6–3.