# 1983 Cologne Cup – Singles

Kevin Curren was the defending champion, but did not compete this year.
Matt Doyle won the title by defeating Hans-Dieter Beutel 1–6, 6–1, 6–2 in the final.

## Seeds

* Brian Gottfried (first round)
* Sandy Mayer (quarterfinals, withdrew)
* Tomáš Šmíd (first round)
* Mel Purcell (first round)
* Tim Mayotte (first round)
* Shlomo Glickstein (second round)
* Eric Korita (second round, retired)
* Mark Dickson (second round)

## 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 | Final | Final | Final | Final |
| Hans-Dieter Beutel | 7 | 2 | 6 | | | | |
| Pavel Složil | 5 | 6 | 1 | | | | |
| Pavel Složil | 5 | 6 | 1 | Hans-Dieter Beutel | 6 | 1 | 2 |
| | | | | Matt Doyle | 1 | 6 | 6 |
| Matt Doyle | 3 | 6 | 6 | Matt Doyle | 1 | 6 | 6 |
| Bernard Mitton | 6 | 3 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | B Gottfried | 3 | 6 | | | | | | | | | | | | | | |
| | S Smith | 6 | 7 | | | S Smith | 5 | 4 | | | | | | | | | |
| Q | E Jelen | 4 | 6 | 6 | Q | E Jelen | 7 | 6 | | | | | | | | | |
| | S Lipton | 6 | 3 | 1 | | | | | | Q | E Jelen | 4 | 5 | | | | |
| | HD Beutel | 6 | 6 | 6 | | | | | | | HD Beutel | 6 | 7 | | | | |
| | C Kirmayr | 7 | 4 | 4 | | HD Beutel | 6 | 7 | | | | | | | | | |
| | M Schapers | 2 | 6 | 2 | 6 | S Glickstein | 1 | 6 | | | | | | | | | |
| 6 | S Glickstein | 6 | 2 | 6 | | | | | | | | | | HD Beutel | 7 | 2 | 6 |
| 4 | M Purcell | 5 | 3 | | | | | | | | | | | P Složil | 5 | 6 | 1 |
| | C Motta | 7 | 6 | | | C Motta | 6 | 4 | 6 | | | | | | | | |
| Q | P Annacone | 6 | 6 | 6 | | N Saviano | 3 | 6 | 7 | | | | | | | | |
| | N Saviano | 3 | 7 | 7 | | | | | | | N Saviano | 3 | 4 | | | | |
| | P Složil | 6 | 6 | | | | | | | | P Složil | 6 | 6 | | | | |
| | E Fromm | 4 | 4 | | | P Složil | 6 | 6 | | | | | | | | | |
| Q | T Benhabiles | 2 | 2 | | 8 | M Dickson | 2 | 4 | | | | | | | | | |
| 8 | M Dickson | 6 | 6 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | E Korita | 6 | 5 | 6 | | | | | | | | | | | | |
| | M Hocevar | 3 | 7 | 4 | 7 | E Korita | 2 | 0$^r$ | | | | | | | | |
| | B Boileau | 4 | 0 | | | M Ostoja | 6 | 3 | | | | | | | | |
| | M Ostoja | 6 | 6 | | | | | | | M Ostoja | 4 | 0 | | | | |
| | F Segărceanu | 0 | 6 | 6 | | | | | | M Doyle | 6 | 6 | | | | |
| | P Elter | 6 | 2 | 2 | | F Segărceanu | 4 | 1 | | | | | | | | |
| | M Doyle | 4 | 6 | 6 | | M Doyle | 6 | 6 | | | | | | | | |
| 3 | T Šmíd | 6 | 3 | 4 | | | | | | | | | M Doyle | 3 | 6 | 6 |
| 5 | T Mayotte | 4 | 5 | | | | | | | | | | B Mitton | 6 | 3 | 4 |
| | T Wilkison | 6 | 7 | | | T Wilkison | 6 | 4 | | | | | | | | |
| | B Mitton | 6 | 6 | | | B Mitton | 7 | 6 | | | | | | | | |
| Q | J Becka | 3 | 4 | | | | | | | B Mitton | w/o | | | | | |
| | A Maurer | 7 | 6 | | | | | | 2 | S Mayer | | | | | | |
| | D Visser | 6 | 2 | | | A Maurer | | | | | | | | | | |
| | B Becker | 6 | 4 | 4 | 2 | S Mayer | w/o | | | | | | | | | |
| 2 | S Mayer | 3 | 6 | 6 | | | | | | | | | | | | |