# 1978 Romika Cup – Singles

Željko Franulović was the defending champion but lost in the semifinals to Buster Mottram.
Guillermo Vilas won in the final 6–1, 6–3, 6–3 against Mottram.

## Seeds

* Guillermo Vilas (champion)
* Buster Mottram (final)
* Balázs Taróczy (semifinals)
* Karl Meiler (quarterfinals)
* Hans Gildemeister (second round)
* Željko Franulović (semifinals)
* Pat Du Pré (first round)
* Jiří Hřebec (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

### Final

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Guillermo Vilas | 6 | 6 | 6 | | | | | |
| 3 | Balázs Taróczy | 1 | 7 | 1 | | | | | |
| 3 | Balázs Taróczy | 1 | 7 | 1 | 1 | Guillermo Vilas | 6 | 6 | 6 |
| | | | | | 2 | Buster Mottram | 1 | 3 | 3 |
| 6 | Željko Franulović | 6 | 4 | 3 | 2 | Buster Mottram | 1 | 3 | 3 |
| 2 | Buster Mottram | 4 | 6 | 6 | | | | | |

### Section 1

| 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 |
| 1 | G Vilas | 6 | 6 | | | | | | | | | | | | | | | |
| | G Gnettner | 4 | 3 | | 1 | G Vilas | 6 | 6 | | | | | | | | | | |
| | J Fassbender | 7 | 4 | 6 | | J Fassbender | 2 | 4 | | | | | | | | | | |
| | O Parun | 6 | 6 | 4 | | | | | | 1 | G Vilas | 6 | 7 | | | | | |
| | G Goven | 7 | 1 | 4 | | | | | | | V Zednik | 2 | 5 | | | | | |
| | V Zednik | 6 | 6 | 6 | | V Zednik | 6 | 4 | 6 | | | | | | | | | |
| | P Cornejo | 3 | 0 | | 5 | H Gildemeister | 3 | 6 | 4 | | | | | | | | | |
| 5 | H Gildemeister | 6 | 6 | | | | | | | | | | | 1 | G Vilas | 6 | 6 | 6 |
| 3 | B Taróczy | 6 | 3 | 7 | | | | | | | | | | 3 | B Taróczy | 1 | 7 | 1 |
| | L Sanders | 3 | 6 | 5 | 3 | B Taróczy | 6 | 3 | 7 | | | | | | | | | |
| | N Pilić | 6 | 6 | 7 | | N Pilić | 2 | 6 | 5 | | | | | | | | | |
| | B Fairlie | 2 | 7 | 5 | | | | | | 3 | B Taróczy | 6 | 6 | | | | | |
| | J Yuill | 1 | 0 | | | | | | | | U Pinner | 3 | 4 | | | | | |
| | U Pinner | 6 | 6 | | | U Pinner | 6 | 4 | 6 | | | | | | | | | |
| | J James | 1 | 5 | | 7 | P Du Pré | 1 | 6 | 2 | | | | | | | | | |
| 7 | P Du Pré | 6 | 7 | | | | | | | | | | | | | | | |

### Section 2

| 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 |
| 6 | Ž Franulović | 7 | 6 | | | | | | | | | | | | | | | |
| | T Okker | 5 | 1 | 6 | Ž Franulović | 6 | 6 | 6 | | | | | | | | | | |
| Q | J Feaver | 6 | 7 | Q | J Feaver | 7 | 0 | 1 | | | | | | | | | | |
| | I El Shafei | 3 | 6 | | | | | | 6 | Ž Franulović | 6 | 6 | | | | | | |
| | J-F Caujolle | 3 | 2 | | | | | | 4 | K Meiler | 1 | 2 | | | | | | |
| | P Feigl | 6 | 6 | | P Feigl | 2 | 2 | | | | | | | | | | | |
| | B Hewitt | 6 | 5 | 4 | K Meiler | 6 | 6 | | | | | | | | | | | |
| 4 | K Meiler | 7 | 6 | | | | | | | | | | | 6 | Ž Franulović | 6 | 4 | 3 |
| 8 | J Hřebec | 3 | 2 | | | | | | | | | | | 2 | B Mottram | 4 | 6 | 6 |
| | F Jauffret | 6 | 6 | | F Jauffret | 4 | 7 | 4 | | | | | | | | | | |
| Q | C Kirmayr | 6 | 6 | Q | C Kirmayr | 6 | 6 | 6 | | | | | | | | | | |
| Q | M Wünschig | 3 | 2 | | | | | | Q | C Kirmayr | 6 | 4 | 3 | | | | | |
| Q | R Cano | 6 | 6 | | | | | | 2 | B Mottram | 4 | 6 | 6 | | | | | |
| | H Kary | 2 | 2 | Q | R Cano | 6 | 2 | 1 | | | | | | | | | | |
| | W Zerngibl | 4 | 5 | 2 | B Mottram | 2 | 6 | 6 | | | | | | | | | | |
| 2 | B Mottram | 6 | 7 | | | | | | | | | | | | | | | |