# 1973 Union Trust Classic – Singles

The 1973 Union Trust Classic – Singles was an event of the 1973 Union Trust Classic men's tennis tournament that was played in Merrifield, Virginia in the United States from March 19 through March 25, 1973. The draw comprised 32 players and four players were seeded. Stan Smith was the defending singles champion but did not take part in this edition. Unseeded Tom Okker won the title, defeating unseeded Arthur Ashe in the final, 6–3, 6–7$^{(4–7)}$, 7–6$^{(7–3)}$.

## Seeds

* Marty Riessen (second round)
* Brian Fairlie (first round)
* Roger Taylor (semifinals)
* Mark Cox (quarterfinals)

## 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 | Final |
| | Tom Okker | 6 | 3 | 6 | | | | | |
| 3 | Roger Taylor | 4 | 6 | 4 | | | | | |
| 3 | Roger Taylor | 4 | 6 | 4 | Tom Okker | Tom Okker | 6 | 6$^4$ | 7$^7$ |
| | | | | | Arthur Ashe | Arthur Ashe | 3 | 7$^7$ | 6$^3$ |
| | Arthur Ashe | 6 | 5 | 6 | Arthur Ashe | Arthur Ashe | 3 | 7$^7$ | 6$^3$ |
| | Ken Rosewall | 4 | 7 | 4 | | | | | |

### Top half

| First Round | First Round | First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Second Round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 2 | Brian Fairlie | 3 | 6 | | | | | | | | | | | | | | | | |
| | Erik van Dillen | 6 | 7 | | | Erik van Dillen | 4 | 2 | | | | | | | | | | | |
| | Tom Okker | 6 | 6 | | | Tom Okker | 6 | 6 | | | | | | | | | | | |
| | Ross Case | 1 | 3 | | | | | | | | Tom Okker | 6 | 6 | | | | | | |
| | Raymond Moore | 7 | 4 | 6 | | | | | | | Ray Moore | 4 | 4 | | | | | | |
| | Pierre Barthès | 5 | 6 | 2 | | Ray Moore | 4 | 6 | 6 | | | | | | | | | | |
| | Premjit Lall | 3 | 4 | | | Jan Kodeš | 6 | 3 | 1 | | | | | | | | | | |
| | Jan Kodeš | 6 | 6 | | | | | | | | | | | | | Tom Okker | 6 | 3 | 6 |
| | Dick Crealy | 7 | 6 | | | | | | | | | | | | 3 | Roger Taylor | 4 | 6 | 4 |
| | Vladimír Zedník | 6 | 1 | | | Dick Crealy | 7 | 6 | | | | | | | | | | | |
| | Butch Buchholz | 1 | 5 | | | Roscoe Tanner | 5 | 4 | | | | | | | | | | | |
| | Roscoe Tanner | 6 | 7 | | | | | | | | Dick Crealy | 3 | 6 | 3 | | | | | |
| | František Pála | w/o | | | | | | | | 3 | Roger Taylor | 6 | 0 | 6 | | | | | |
| | Haroon Rahim | | | | | František Pála | 3 | 7 | 2 | | | | | | | | | | |
| | Dennis Ralston | 3 | 6 | | 3 | Roger Taylor | 6 | 6 | 6 | | | | | | | | | | |
| 3 | Roger Taylor | 6 | 7 | | | | | | | | | | | | | | | | |

### Bottom half

| First Round | First Round | First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Second Round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 4 | Mark Cox | 6 | 7 | | | | | | | | | | | | | | |
| | Torben Ulrich | 2 | 6 | | 4 | Mark Cox | 6 | 7 | | | | | | | | | |
| | Graham Stilwell | 1 | 1 | | | Tom Leonard | 2 | 6 | | | | | | | | | |
| | Tom Leonard | 6 | 6 | | | | | | | 4 | Mark Cox | 2 | 1 | | | | |
| | Boro Jovanović | 6 | 1 | 4 | | | | | | | Arthur Ashe | 6 | 6 | | | | |
| | Jeff Borowiak | 2 | 6 | 6 | | Jeff Borowiak | 6 | 2 | 3 | | | | | | | | |
| | Ismail El Shafei | 3 | 7 | 0 | | Arthur Ashe | 4 | 6 | 6 | | | | | | | | |
| | Arthur Ashe | 6 | 6 | 6 | | | | | | | | | | Arthur Ashe | 6 | 5 | 6 |
| | Ken Rosewall | 6 | 6 | | | | | | | | | | | Ken Rosewall | 4 | 7 | 4 |
| | Željko Franulović | 3 | 4 | | | Ken Rosewall | 6 | 6 | | | | | | | | | |
| | Tom Gorman | 4 | 2 | | | Fred Stolle | 3 | 1 | | | | | | | | | |
| | Fred Stolle | 6 | 6 | | | | | | | | Ken Rosewall | 6 | 6 | | | | |
| | Alex Metreveli | 7 | 3 | 6 | | | | | | | Alex Metreveli | 4 | 2 | | | | |
| | Bob Carmichael | 5 | 6 | 1 | | Alex Metreveli | 6 | 5 | 6 | | | | | | | | |
| | Jean-Baptiste Chanfreau | 3 | 5 | | 1 | Marty Riessen | 0 | 7 | 1 | | | | | | | | |
| 1 | Marty Riessen | 6 | 7 | | | | | | | | | | | | | | |