| Singles | |
|---|---|
| 1990 Yugoslav Open | |
| Champion |  Goran Prpić |
| Runner-up | Goran Ivanišević |
| Score | 6–3, 4-6, 6–4 |
| Draw | 32 (3WC/4Q) |
| Seeds | 8 |
The first edition of the ATP tournament in Umag was held from 14 May until 20 May 1990. [1]
Goran Prpić won the title by defeating Goran Ivanišević 6–3, 4–6, 6–4 in the final. [2] [3]
Goran Prpić (champion) Goran Ivanišević (final)
Mark Koevermans (second round)
Jens Woehrmann (first round)
Andrei Cherkasov (semifinals)
Aki Rahunen (quarterfinals)
Marián Vajda (second round)
Thierry Tulasne (first round)| Semifinals | Final | ||||||||||||
| 1 | Goran Prpić | 7 | 7 | ||||||||||
 Horacio de la Peña | 6 | 6 | |||||||||||
| 1 | Goran Prpić | 6 | 4 | 6 | |||||||||
| 2 | Goran Ivanišević | 3 | 6 | 4 | |||||||||
| 5/WC | Andrei Cherkasov | 3 | 7 | 4 | |||||||||
| 2 | Goran Ivanišević | 6 | 5 | 6 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | G Prpić | 6 | 6 | 6 | |||||||||||||||||||||||
| Q |  E Masso | 7 | 4 | 0 | 1 | G Prpić | 6 | 6 | |||||||||||||||||||
 M Tauson | 6 | 4 |  D Perez | 2 | 0 | ||||||||||||||||||||||
| D Perez | 7 | 6 | 1 | G Prpić | 6 | 6 | |||||||||||||||||||||
| R Azar | 6 | 6 | R Azar | 4 | 4 | ||||||||||||||||||||||
| Q | P Dogger | 2 | 3 | R Azar | 0 | 77 | 6 | ||||||||||||||||||||
| WC |  F Cancellotti | 4 | 1 | 7 | M Vajda | 6 | 6 | 3 | |||||||||||||||||||
| 7 | M Vajda | 6 | 6 | 1 | G Prpić | 7 | 7 | ||||||||||||||||||||
| 3 | M Koevermans | 7 | 6 | H de la Peña | 6 | 6 | |||||||||||||||||||||
| WC | S Hiršzon | 6 | 3 | 3 | M Koevermans | 6 | 3 | ||||||||||||||||||||
| E Bengoechea | 7 | 2 | 0 | H de la Peña | 7 | 6 | |||||||||||||||||||||
| H de la Peña | 5 | 6 | 6 | H de la Peña | 5 | 7 | 6 | ||||||||||||||||||||
 N Marques | 4 | 7 | 6 | 6 | A Rahunen | 7 | 6 | 1 | |||||||||||||||||||
 L Jönsson | 6 | 5 | 3 | N Marques | 6 | 4 | |||||||||||||||||||||
 G Bloom | 5 | 4 | 6 | A Rahunen | 7 | 6 | |||||||||||||||||||||
| 6 | A Rahunen | 7 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5/WC | A Cherkasov | 6 | 6 | ||||||||||||||||||||||||
| Q |  J Clavet | 2 | 4 | 5/WC | A Cherkasov | 6 | 6 | ||||||||||||||||||||
| O Delaître | 6 | 4 | F Roig | 3 | 4 | ||||||||||||||||||||||
| F Roig | 7 | 6 | 5/WC | A Cherkasov | 6 | 6 | |||||||||||||||||||||
| Q | D Buljević | 6 | 6 | E Jelen | 2 | 0 | |||||||||||||||||||||
 J Anderson | 3 | 4 | Q | D Buljević | 6 | 3 | 6 | ||||||||||||||||||||
| E Jelen | 6 | 3 | 6 | E Jelen | 2 | 6 | 7 | ||||||||||||||||||||
| 4 | J Woehrmann | 1 | 6 | 0 | 5/WC | A Cherkasov | 3 | 7 | 4 | ||||||||||||||||||
| 8 | T Tulasne | 6 | 3 | 1 | 2 | G Ivanišević | 6 | 5 | 6 | ||||||||||||||||||
| J Potier | 3 | 6 | 6 | J Potier | 2 | 6 | 6 | ||||||||||||||||||||
| C Saceanu | 2 | 2 | T Benhabiles | 6 | 3 | 7 | |||||||||||||||||||||
| T Benhabiles | 6 | 6 | T Benhabiles | 4 | 6 | ||||||||||||||||||||||
 M Tabares | 4 | 4 | 2 | G Ivanišević | 6 | 7 | |||||||||||||||||||||
| F Luna | 6 | 6 | F Luna | 2 | 3 | ||||||||||||||||||||||
 N Pereira | 1 | 4 | 2 | G Ivanišević | 6 | 6 | |||||||||||||||||||||
| 2 | G Ivanišević | 6 | 6 | ||||||||||||||||||||||||
Goran Prpić is a Croatian tennis coach and former professional tennis player, who played for SFR Yugoslavia and Croatia.
Andre Agassi defeated Goran Ivanišević in the final, 6–7(8–10), 6–4, 6–4, 1–6, 6–4 to win the gentlemen's singles tennis title at the 1992 Wimbledon Championships. It was his first major title, and his first leg of an eventual career Grand Slam. Ivanisević became the first Croatian representing Croatia to reach a major final.
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Pieter Aldrich and Danie Visser were the defending champions, but Aldrich did not compete this year. Visser teamed up with Gary Muller and lost in the quarterfinals to Nick Brown and Richard Vogel.
The 1990 Yugoslav Open was a men's tennis tournament played on outdoor clay courts in Umag, Yugoslavia that was part of the World Series of the 1990 ATP Tour. It was the first edition of the tournament and was held from 14 May until 20 May 1990. No.1 seed Goran Prpić won the singles title.
Goran Prpić was the defending champion, but did not compete this year.
The first edition of the ATP tournament in Umag was held from 14 May until 20 May 1990.
Jim Courier was the defending champion, but lost in the second round to Andrei Cherkasov.
In the first edition of the tournament, Goran Ivanišević won the title by defeating Andrei Cherkasov 6–2, 7–6(7–5) in the final.