1991 ATP Tour World Championships
| 1991 ATP Tour World Championships | |
|---|---|
| Date | November 12 – November 17 |
| Edition | 22nd |
| Venue | Festhalle Frankfurt |
| Champions | |
| Singles | |
 Pete Sampras
|
|
| Doubles | |
 John Fitzgerald /  Anders Järryd
|
|
The 1991 ATP Tour World Championships (The singles event was also known as the 1991 IBM ATP Tour World Championships whilst the doubles event was also known as the 1991 Standard Bank ATP Tour World Doubles Final for sponsorship reasons) was held in Frankfurt, Germany between November 12 and November 17, 1991.
Pete Sampras def. Jim Courier, 3–6, 7–6(5), 6–3, 6–4
John Fitzgerald / Anders Järryd def. Ken Flach / Robert Seguso 6–4, 6–4, 2–6, 6–4.
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