# 2025 Arizona Tennis Classic – Singles

Nuno Borges was the two-time defending champion but lost in the semifinals to Alexander Bublik.
João Fonseca won the title after defeating Bublik 7–6$^{(7–5)}$, 7–6$^{(7–0)}$ in the final.

## Seeds

The top four seeds received a bye into the second round.
* Nuno Borges (semifinals)
* Flavio Cobolli (quarterfinals)
* Pedro Martínez (second round)
* Jan-Lennard Struff (second round)
* Aleksandar Vukic (first round)
* Luca Nardi (first round)
* Roman Safiullin (second round)
* Arthur Rinderknech (first round)

## 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 |
| 1 | Nuno Borges | 3 | 4 | | | |
| | Alexander Bublik | 6 | 6 | | | |
| | Alexander Bublik | 6 | 6 | Alexander Bublik | 6$^5$ | 6$^0$ |
| | | | | João Fonseca | 7$^7$ | 7$^7$ |
| | João Fonseca | 6 | 6 | João Fonseca | 7$^7$ | 7$^7$ |
| | Kei Nishikori | 3 | 3 | | | |

### 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 | Semifinals |
| | | | | | 1 | N Borges | 6 | 7 | | | | | | | | | | |
| | J Fearnley | 7$^7$ | 6 | | | J Fearnley | 2 | 5 | | | | | | | | | | |
| | J Duckworth | 6$^3$ | 3 | | | | | | | 1 | N Borges | 6 | 6 | | | | | |
| WC | C Smith | 6 | 7 | | | | | | | WC | C Smith | 4 | 4 | | | | | |
| Alt | A Shevchenko | 1 | 5 | | WC | C Smith | 6 | 7$^7$ | | | | | | | | | | |
| Alt | C Eubanks | 6$^2$ | 1 | | 7 | R Safiullin | 4 | 6$^2$ | | | | | | | | | | |
| 7 | R Safiullin | 7$^7$ | 6 | | | | | | | | | | | | 1 | N Borges | 3 | 4 |
| | | | | | | | | | | | | | | | | A Bublik | 6 | 6 |
| | | | | | 3 | P Martínez | 4 | 3 | | | | | | | | | | |
| | C Moutet | 6 | 6 | | | C Moutet | 6 | 6 | | | | | | | | | | |
| Q | N Basilashvili | 3 | 2 | | | | | | | | C Moutet | 6 | 6$^4$ | 5 | | | | |
| | R Hijikata | 7$^7$ | 7$^7$ | | | | | | | | A Bublik | 2 | 7$^7$ | 7 | | | | |
| WC | B Holt | 6$^0$ | 6$^3$ | | | R Hijikata | 2 | 7 | 3 | | | | | | | | | |
| | A Bublik | 6 | 3 | 6 | | A Bublik | 6 | 5 | 6 | | | | | | | | | |
| 5 | A Vukic | 3 | 6 | 3 | | | | | | | | | | | | | | |

### 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 |
| 8 | A Rinderknech | 6 | 5 | 5 | | | | | | | | | | | | | |
| Alt | R Opelka | 4 | 7 | 7 | Alt | R Opelka | 6$^6$ | 3 | | | | | | | | | |
| | A Walton | 2 | 4 | | | H Gaston | 7$^8$ | 6 | | | | | | | | | |
| | H Gaston | 6 | 6 | | | | | | | | H Gaston | 4 | 4 | | | | |
| | P Kotov | 2 | 4 | | | | | | | | J Fonseca | 6 | 6 | | | | |
| | J Fonseca | 6 | 6 | | | J Fonseca | 6 | 4 | 6 | | | | | | | | |
| | | | | | 4 | J-L Struff | 1 | 6 | 3 | | | | | | | | |
| | | | | | | | | | | | | | | | J Fonseca | 6 | 6 |
| 6 | L Nardi | 4 | 3 | | | | | | | | | | | | K Nishikori | 3 | 3 |
| | K Nishikori | 6 | 6 | | | K Nishikori | 6 | 2 | | | | | | | | | |
| Q | M Kukushkin | 6 | 6 | | Q | M Kukushkin | 3 | 1$^r$ | | | | | | | | | |
| Q | Y Uchiyama | 4 | 2 | | | | | | | | K Nishikori | 6 | 4 | 6 | | | |
| Q | L Tu | 4 | 2 | | | | | | | 2 | F Cobolli | 2 | 6 | 4 | | | |
| WC | E Spizzirri | 6 | 6 | | WC | E Spizzirri | 3 | 7 | 5 | | | | | | | | |
| | | | | | 2 | F Cobolli | 6 | 5 | 7 | | | | | | | | |