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| Singles | ||||
|---|---|---|---|---|
| 1991 ATP Tour World Championships | ||||
| Final | ||||
| Champion |  Pete Sampras | |||
| Runner-up | Jim Courier | |||
| Score | 3–6, 7–6, 6–3, 6–4 | |||
| Details | ||||
| Draw | 8 | |||
| Events | ||||
| ||||
| ||||
Pete Sampras defeated Jim Courier in the final, 3–6, 7–6, 6–3, 6–4 to win the singles title at the 1991 ATP Tour World Championships. It was his first Tour Finals title.
Andre Agassi was the defending champion, but was defeated by Courier in the semifinals.
Draw
Finals
| Semifinals | Final | ||||||||||||||
| 4 |  Ivan Lendl
| 2 | 3 | ||||||||||||
| 6 | Pete Sampras
| 6 | 6 | ||||||||||||
| 6 | Pete Sampras
| 3 | 7 | 6 | 6 | ||||||||||
| 1 | Jim Courier
| 6 | 6 | 3 | 4 | ||||||||||
| 7 | Andre Agassi
| 3 | 5 | ||||||||||||
| 1 | Jim Courier
| 6 | 7 | ||||||||||||
Ilie Năstase group
| Courier
|
Lendl
|
 Forget
|
Nováček
|
RR W–L |
Set W–L |
Game W–L |
Standings | ||
| 1 | Jim Courier
|
2–6, 3–6 | 7–6, 6–4 | 6–7, 7–6, 6–4 | 2–1 | 4–3 | 37–39 | 2 | |
| 4 | Ivan Lendl
|
6–2, 6–3 | 6–2, 6–4 | 6–2, 6–2 | 3–0 | 6–0 | 36–15 | 1 | |
| 5 | Guy Forget
|
6–7, 4–6 | 2–6, 4–6 | 6–3, 7–6 | 1–2 | 2–4 | 29–34 | 3 | |
| 8 | Karel Nováček
|
7–6, 6–7, 4–6 | 2–6, 2–6 | 3–6, 6–7 | 0–3 | 1–6 | 30–44 | 4 |
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.
John Newcombe group
 Becker
|
Stich
|
Sampras
|
Agassi
|
RR W–L |
Set W–L |
Game W–L |
Standings | ||
| 2 | Boris Becker
|
7–6, 6–3 | 6–4, 6–7, 6–1 | 3–6, 5–7 | 2–1 | 4–3 | 39–34 | 3 | |
| 3 | Michael Stich
|
6–7, 3–6 | 2–6, 6–7 | 5–7, 3–6 | 0–3 | 0–6 | 25–39 | 4 | |
| 6 | Pete Sampras
|
4–6, 7–6, 1–6 | 6–2, 7–6 | 6–3, 1–6, 6–3 | 2–1 | 5–3 | 38–38 | 2 | |
| 7 | Andre Agassi
|
6–3, 7–5 | 7–5, 6–3 | 3–6, 6–1, 3–6 | 2–1 | 5–2 | 38–29 | 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.