# 2023 Tiburon Challenger – Singles

Zachary Svajda was the defending champion and successfully defended his title after defeating Adam Walton 6–2, 6–2 in the final.

## Seeds

* Alex Michelsen (second round)
* Nicolas Moreno de Alboran (first round)
* Zachary Svajda (champion)
* Denis Kudla (first round)
* Alexis Galarneau (semifinals)
* Vasek Pospisil (first round)
* Ryan Peniston (second round)
* Tennys Sandgren (second round, retired)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Tristan Schoolkate | 4 | 5 | | | | |
| | Adam Walton | 6 | 7 | | | | |
| | Adam Walton | 6 | 7 | | Adam Walton | 2 | 2 |
| | | | | 3 | Zachary Svajda | 6 | 6 |
| 3 | Zachary Svajda | 6 | 6 | 3 | Zachary Svajda | 6 | 6 |
| 5 | Alexis Galarneau | 3 | 4 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 1 | A Michelsen | 6$^2$ | 6 | 6 | | | | | | | | | | | | | |
| Q | B Schnur | 7$^7$ | 3 | 4 | 1 | A Michelsen | 6 | 4 | 3 | | | | | | | | |
| | G Mpetshi Perricard | 6$^4$ | 3 | | Q | T-S Kwiatkowski | 4 | 6 | 6 | | | | | | | | |
| Q | T-S Kwiatkowski | 7$^7$ | 6 | | | | | | | Q | T-S Kwiatkowski | 6 | 4 | 2 | | | |
| WC | O Baris | 3 | 1 | | | | | | | | T Schoolkate | 3 | 6 | 6 | | | |
| | T Schoolkate | 6 | 6 | | | T Schoolkate | 6 | 6 | | | | | | | | | |
| | M Krueger | 6$^4$ | 2 | | 7 | R Peniston | 3 | 4 | | | | | | | | | |
| 7 | R Peniston | 7$^7$ | 6 | | | | | | | | | | | | T Schoolkate | 4 | 5 |
| 4 | D Kudla | 1 | 6 | 6$^{12}$ | | | | | | | | | | | A Walton | 6 | 7 |
| | B Tomic | 6 | 4 | 7$^{14}$ | | B Tomic | 7$^7$ | 6 | | | | | | | | | |
| Q | A Perez | 1 | 3 | | | M Lajal | 6$^1$ | 3 | | | | | | | | | |
| | M Lajal | 6 | 6 | | | | | | | | B Tomic | 4 | 4 | | | | |
| Q | Garrett Johns | 2 | 4 | | | | | | | | A Walton | 6 | 6 | | | | |
| WC | L Tien | 6 | 6 | | WC | L Tien | 2 | 4 | | | | | | | | | |
| | A Walton | 6 | 7$^7$ | | | A Walton | 6 | 6 | | | | | | | | | |
| 6 | V Pospisil | 4 | 6$^5$ | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | T Sandgren | 6 | 6 | | | | | | | | | | | | | | | |
| Q | C Kingsley | 4 | 4 | | 8 | T Sandgren | 2 | 1$^r$ | | | | | | | | | | |
| Q | N Basavareddy | 6 | 4 | | Q | N Basavareddy | 6 | 3 | | | | | | | | | | |
| | A Shelbayh | 0 | 2$^r$ | | | | | | | Q | N Basavareddy | 0 | 2 | | | | | |
| WC | Stefan Dostanic | 6$^3$ | 6 | 2 | | | | | | 3 | Z Svajda | 6 | 6 | | | | | |
| | S Johnson | 7$^7$ | 3 | 6 | | S Johnson | 6 | 3 | 4 | | | | | | | | | |
| PR | C Harrison | 6$^6$ | 5 | | 3 | Z Svajda | 3 | 6 | 6 | | | | | | | | | |
| 3 | Z Svajda | 7$^8$ | 7 | | | | | | | | | | | | 3 | Z Svajda | 6 | 6 |
| 5 | A Galarneau | 7$^7$ | 6 | | | | | | | | | | | | 5 | A Galarneau | 3 | 4 |
| | P Kypson | 6$^5$ | 4 | | 5 | A Galarneau | 7$^7$ | 1 | 7 | | | | | | | | | |
| | A Dougaz | 7$^7$ | 6 | | | A Dougaz | 6$^5$ | 6 | 5 | | | | | | | | | |
| | M Poljičak | 6$^3$ | 4 | | | | | | | 5 | A Galarneau | 6 | 6$^6$ | 7 | | | | |
| | L Lokoli | 6$^3$ | 2 | | | | | | | | A Ritschard | 3 | 7$^8$ | 5 | | | | |
| | J Monday | 7$^7$ | 6 | | | J Monday | 3 | 7$^7$ | 6$^2$ | | | | | | | | | |
| | A Ritschard | 6 | 7 | | | A Ritschard | 6 | 6$^5$ | 7$^7$ | | | | | | | | | |
| 2 | N Moreno de Alboran | 2 | 5 | | | | | | | | | | | | | | | |