| 2023 Tiburon Challenger | |
|---|---|
| Date | 2–8 October |
| Edition | 15th |
| Surface | Hard |
| Location | Tiburon, United States |
| Champions | |
| Singles | |
 Zachary Svajda | |
| Doubles | |
 Luke Johnson /  Skander Mansouri | |
The 2023 Tiburon Challenger was a professional tennis tournament played on outdoor hard courts. It was the 15th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Tiburon, United States between October 2 and October 8, 2023.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| USA | Alex Michelsen | 110 | 1 |
| USA | Nicolas Moreno de Alboran | 156 | 2 |
| USA | Zachary Svajda | 167 | 3 |
| USA | Denis Kudla | 173 | 4 |
 CAN | Alexis Galarneau | 176 | 5 |
| CAN | Vasek Pospisil | 186 | 6 |
| GBR | Ryan Peniston | 197 | 7 |
| USA | Tennys Sandgren | 200 | 8 |
The following players received wildcards into the singles main draw:
Ozan Baris Stefan Dostanic Learner Tien The following player received entry into the singles main draw using a protected ranking:
The following players received entry from the qualifying draw:
Zachary Svajda def. 
Adam Walton 6–2, 6–2. Luke Johnson / Skander Mansouri def. William Blumberg / 
Luis David Martínez 6–2, 6–3.The 2009 Royal Bank of Scotland Challenger was a professional tennis tournament played on outdoor hard courts. It was the third edition of the tournament which was part of the 2009 ATP Challenger Tour. It took place in Tiburon, California, United States between 12 and 18 October 2009. It was part of the Tiburon Challenger series.
The 2010 Royal Bank of Scotland Challenger was a professional tennis tournament played on hard courts. It was the fourth edition of the tournament which is part of the 2010 ATP Challenger Tour. It took place in Tiburon, California, United States between October 12 and October 17, 2010.
The 2011 Royal Bank of Scotland Challenger was a professional tennis tournament played on hard courts. It was the fifth edition of the tournament which was part of the 2011 ATP Challenger Tour. It took place in Tiburon, United States between October 10 and October 16, 2011.
The 2012 Tiburon Challenger was a professional tennis tournament played on hard courts. It was the sixth edition of the tournament which was part of the 2012 ATP Challenger Tour. It took place in Tiburon, California, United States between October 8 and October 14, 2012.
The 2013 Tiburon Challenger was a professional tennis tournament played on hard courts. It was the seventh edition of the tournament which was part of the 2013 ATP Challenger Tour. It took place in Tiburon, California, United States between October 7 and October 13, 2013.
The 2014 Tiburon Challenger was a professional tennis tournament played on hard courts. It was the eighth edition of the tournament which was part of the 2014 ATP Challenger Tour. It took place in Tiburon, California, United States between October 4 and October 10, 2014.
The 2015 Tiburon Challenger was a professional tennis tournament played on outdoor hard courts. It was the ninth edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Tiburon, United States between September 26 and October 4, 2015.
The 2016 Tiburon Challenger was a professional tennis tournament played on outdoor hard courts. It was the tenth edition of the tournament which was part of the 2016 ATP Challenger Tour. It took place in Tiburon, United States between September 26 and October 2, 2016.
The 2017 Tiburon Challenger was a professional tennis tournament played on outdoor hard courts. It was the eleventh edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Tiburon, United States between September 25 and October 1, 2017.
The 2017 Stockton ATP Challenger was a professional tennis tournament played on hard courts. It was the second edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Stockton, California, United States between 2 October and 8 October 2017.
The 2017 Fairfield Challenger was a professional tennis tournament played on hard courts. It was the third edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Fairfield, California, United States between October 9 and October 15, 2017.
The 2017 Latrobe City Traralgon ATP Challenger was a professional tennis tournament played on outdoor hard court. It was the sixth edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Traralgon, Australia between 23–29 October 2017.
The 2018 Tiburon Challenger was a professional tennis tournament played on outdoor hard courts. It was the twelfth edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Tiburon, United States between September 24 and September 30, 2018.
The 2019 Tiburon Challenger was a professional tennis tournament played on outdoor hard courts. It was the thirteenth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Tiburon, California, United States, between September 23 and September 29, 2019.
The 2019 Lima Challenger was a professional tennis tournament played on clay courts. It was the thirteenth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Lima, Peru between October 21 and October 27, 2019.
The 2019 Shenzhen Longhua Open was a professional tennis tournament played on hard courts. It was the third (men) and fourth (women) editions of the tournament which was part of the 2019 ATP Challenger Tour and the 2019 ITF Women's World Tennis Tour. It took place in Shenzhen, China between 28 October and 10 November 2019.
The 2022 Tiburon Challenger was a professional tennis tournament played on outdoor hard courts. It was the fourteenth edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Tiburon, United States between October 3 and October 9, 2022.
The 2022 Fairfield Challenger was a professional tennis tournament played on hard courts. It was the sixth edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Fairfield, California, United States between October 10 and October 16, 2022.
The 2022 Calgary National Bank Challenger was a professional tennis tournament played on indoor hard courts. It was the third edition of the tournament which was part of the 2022 ATP Challenger Tour and the first edition of the tournament which was part of the 2022 ITF Women's World Tennis Tour. It took place in Calgary, Canada between 7 and 13 November 2022.
The 2022 Slovak Open was a professional tennis tournament played on hard courts. It was the 24th edition of the tournament which was part of the 2022 ATP Challenger Tour and the ninth edition of the tournament which was part of the 2022 ITF Women's World Tennis Tour. It took place in Bratislava, Slovakia between 7 and 20 November 2022.