1990 U.S. Men's Clay Court Championships – Singles
| Singles | |
|---|---|
| 1990 U.S. Men's Clay Court Championships | |
| Champion | David Wheaton |
| Runner-up | Mark Kaplan |
| Score | 6–4, 6–3 |
| Draw | 32 |
| Seeds | 8 |
Jay Berger was the defending champion, but did not participate this year.
David Wheaton won the title, defeating Mark Kaplan 6–4, 6–3 in the final.
Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
- Richey Reneberg (second round)
- Jim Grabb (first round)
- David Wheaton (champion)
- Scott Davis (first round)
- Dan Goldie (first round)
- Lawson Duncan (first round)
- Derrick Rostagno (quarterfinals)
- MaliVai Washington (semifinals)
Draw
Key
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- ITF = ITF entry
- PR = Protected ranking
- SR = Special ranking
- SE = Special exempt
- JE = Junior exempt
- JR = Junior Accelerator Programme entrant
- CO = College Accelerator Programme entrant
- NG = Next Gen Accelerator Program entrant
- w/o = Walkover
- r = Retired
- d = Defaulted