1990 ATP Tour World Championships – Singles
| Singles | |
|---|---|
| 1990 ATP Tour World Championships | |
| Champion |
 Andre Agassi
|
| Runner-up |
 Stefan Edberg
|
| Final score | 5–7, 7–6(7–5), 7–5, 6–2 |
Stefan Edberg was the defending champion of the singles title at the ATP Tour World Championships men's tennis tournament, but Andre Agassi defeated him 5–7, 7–6(7–5), 7–5, 6–2 in the final.
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.
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.
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