1975 Commercial Union Assurance Masters – Singles
# 1975 Commercial Union Assurance Masters – Singles

Ilie Năstase defeated Björn Borg in the final, 6–2, 6–2, 6–1 to win the singles title at the 1975 Commercial Union Assurance Masters.

Guillermo Vilas was the defending champion, but lost to Năstase in the semifinals in a rematch of the previous year's final.

## 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 | Semifinals | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - | - |
| Ilie Năstase | 6 | 6 | 6 | | | | | |
| Guillermo Vilas | 0 | 3 | 4 | | | | | |
| Guillermo Vilas | 0 | 3 | 4 | | Ilie Năstase | 6 | 6 | 6 |
| | | | | | Björn Borg | 2 | 2 | 1 |
| Björn Borg | 6 | 3 | 6 | 6 | Björn Borg | 2 | 2 | 1 |
| Arthur Ashe | 4 | 6 | 2 | 2 | | | | |

### Blue group

| | Orantes | Panatta | Năstase | Ashe | RR W–L | Set W–L | Game W–L | Standings |
| - | - | - | - | - | - | - | - | - |
| Manuel Orantes | | 6–4, 7–6 | 6–3, 4–6, 4–6 | 4–6, 1–6 | 1–2 | 3–4 | 32–37 | 3 |
| Adriano Panatta | 4–6, 6–7 | | 6–7, 6–3, 0–6 | 6–7, 3–6 | 0–3 | 1–6 | 31–42 | 4 |
| Ilie Năstase | 3–6, 6–4, 6–4 | 7–6, 3–6, 6–0 | | 6–1, 5–7, 1–4 d | 2–1 | 5–3 | 43–40 | 2 |
| Arthur Ashe | 6–4, 6–1 | 7–6, 6–3 | 1–6, 7–5, 4–1 d | | 3–0 | 6–1 | 47–36 | 1 |

Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.

### White group

| | Solomon | Ramírez | Vilas | Borg | RR W–L | Set W–L | Game W–L | Standings |
| - | - | - | - | - | - | - | - | - |
| Harold Solomon | | 5–7, 6–3, 6–3 | 3–6, 4–6 | 2–6, 2–6 | 1–2 | 2–5 | 27–37 | 3 |
| Raúl Ramírez | 7–5, 3–6, 3–6 | | 4–6, 0–6 | 3–6, 3–6 | 0–3 | 1–6 | 17–41 | 4 |
| Guillermo Vilas | 6–3, 6–4 | 6–4, 6–0 | | 7–5, 4–6, 6–1 | 3–0 | 6–1 | 41–23 | 1 |
| Björn Borg | 6–2, 6–2 | 6–3, 6–3 | 5–7, 6–4, 1–6 | | 2–1 | 5–2 | 36–27 | 2 |

Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.

