# 1985 Cologne Cup – Singles

Joakim Nyström was the defending champion, but chose to focus only on the doubles tournament, finishing as runner-up.
Qualifier Peter Lundgren won the title by defeating Ramesh Krishnan 6–3, 6–2 in the final.

## Seeds

* Kevin Curren (first round)
* Miloslav Mečíř (first round)
* Ramesh Krishnan (final)
* Jan Gunnarsson (first round)
* Tim Wilkison (semifinals)
* Larry Stefanki (second round)
* Kent Carlsson (first round)
* Marián Vajda (first 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 | Semifinals | Final | Final | Final | Final |
| | Mark Dickson | 6 | 1 | 5 | | | | |
| 3 | Ramesh Krishnan | 2 | 6 | 7 | | | | |
| 3 | Ramesh Krishnan | 2 | 6 | 7 | 3 | Ramesh Krishnan | 3 | 2 |
| | | | | | Q | Peter Lundgren | 6 | 6 |
| 5 | Tim Wilkison | 4 | 6 | 6 | Q | Peter Lundgren | 6 | 6 |
| Q | Peter Lundgren | 6 | 1 | 7 | | | | |

### 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 |
| 1/WC | K Curren | 6 | 6 | 2 | | | | | | | | | | | | | | | |
| | R Agénor | 4 | 7 | 6 | | R Agénor | 6 | 6 | 3 | | | | | | | | | | |
| | J Lapidus | 5 | 4 | | | H de la Peña | 2 | 7 | 6 | | | | | | | | | | |
| | H de la Peña | 7 | 6 | | | | | | | | H de la Peña | 3 | 3 | | | | | | |
| WC | T Meinecke | 4 | 4 | | | | | | | | M Dickson | 6 | 6 | | | | | | |
| Q | T Benhabiles | 6 | 6 | | Q | T Benhabiles | 2 | 1 | | | | | | | | | | | |
| | M Dickson | 7 | 7 | | | M Dickson | 6 | 6 | | | | | | | | | | | |
| 7 | K Carlsson | 5 | 6 | | | | | | | | | | | | | M Dickson | 6 | 1 | 5 |
| 3 | R Krishnan | 6 | 6 | | | | | | | | | | | | 3 | R Krishnan | 2 | 6 | 7 |
| Q | M Ostoja | 3 | 2 | | 3 | R Krishnan | 2 | 6 | 6 | | | | | | | | | | |
| | J Navrátil | 2 | 4 | | | J Svensson | 6 | 1 | 0 | | | | | | | | | | |
| | J Svensson | 6 | 6 | | | | | | | 3 | R Krishnan | 3 | 6 | 7 | | | | | |
| | M Schapers | 4 | 6 | 2 | | | | | | | J Lloyd | 6 | 3 | 5 | | | | | |
| | J Lloyd | 6 | 4 | 6 | | J Lloyd | 7 | 6 | | | | | | | | | | | |
| | W Popp | 1 | 4 | | 6 | L Stefanki | 6 | 3 | | | | | | | | | | | |
| 6 | L Stefanki | 6 | 6 | | | | | | | | | | | | | | | | |

### 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 | Semifinals |
| 5 | T Wilkison | 6 | 7 | | | | | | | | | | | | | | | |
| | M De Palmer | 3 | 5 | | 5 | T Wilkison | 6 | 6 | | | | | | | | | | |
| | P Fleming | 4 | 2 | | | C Hooper | 3 | 0 | | | | | | | | | | |
| | C Hooper | 6 | 6 | | | | | | | 5 | T Wilkison | 6 | 6 | | | | | |
| WC | P Korda | 3 | 4 | | | | | | | | To Gullikson | 2 | 0 | | | | | |
| | L Duncan | 6 | 6 | | | L Duncan | 7 | 4 | 3 | | | | | | | | | |
| | To Gullikson | 3 | 7 | 6 | | To Gullikson | 5 | 6 | 6 | | | | | | | | | |
| 4 | J Gunnarsson | 6 | 6 | 4 | | | | | | | | | | 5 | T Wilkison | 4 | 6 | 6 |
| 8 | M Vajda | 3 | 3 | | | | | | | | | | | Q | P Lundgren | 6 | 1 | 7 |
| Q | G Prpić | 6 | 6 | | Q | G Prpić | 6 | 3 | | | | | | | | | | |
| Q | P Lundgren | 6 | 5 | 6 | Q | P Lundgren | 7 | 6 | | | | | | | | | | |
| | W Fibak | 3 | 7 | 3 | | | | | | Q | P Lundgren | 6 | 6 | | | | | |
| | C Panatta | 6 | 1 | 4 | | | | | | SE | J Bates | 4 | 0 | | | | | |
| | P Složil | 4 | 6 | 6 | | P Složil | 2 | 3 | | | | | | | | | | |
| SE | J Bates | 7 | 1 | 6 | SE | J Bates | 6 | 6 | | | | | | | | | | |
| 2 | M Mečíř | 6 | 6 | 4 | | | | | | | | | | | | | | |