| Doubles | |
|---|---|
| 1990 Yugoslav Open | |
| Champions |  Vojtěch Flégl Daniel Vacek |
| Runners-up |  Andrei Cherkasov Andrei Olhovskiy |
| Score | 6–4, 6–4 |
| Draw | 16 |
| Seeds | 4 |
The first edition of the ATP tournament in Umag was held from 14 May until 20 May 1990. [1]
Vojtěch Flégl and Daniel Vacek won the title by defeating Andrei Cherkasov and Andrei Olhovskiy 6–4, 6–4 in the final. [2] [3]
Balázs Taróczy / Marián Vajda (first round)
Alfonso Mora / 
Brian Page (first round)
Eduardo Masso / 
Diego Pérez (semifinals)
Gilad Bloom / Nicolás Pereira (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | B Taróczy M Vajda | 4 | 3 | ||||||||||||||||||||||||
| A Cherkasov A Olhovskiy | 6 | 6 | A Cherkasov A Olhovskiy | 7 | 7 | ||||||||||||||||||||||
 G Ivanišević G Prpić | 6 | 7 | G Ivanišević G Prpić | 5 | 5 | ||||||||||||||||||||||
 T Nydahl  V Solves | 2 | 6 | A Cherkasov A Olhovskiy | w/o | |||||||||||||||||||||||
| 3 | E Masso D Pérez | 5 | 6 | 7 | 3 | E Masso D Pérez | |||||||||||||||||||||
| J Clavet MA Górriz | 7 | 4 | 5 | 3 | E Masso D Pérez | 4 | 6 | 6 | |||||||||||||||||||
 T Benhabiles T Tulasne | 1 | 2 |  R Camargo O Della | 6 | 2 | 3 | |||||||||||||||||||||
| R Camargo O Della | 6 | 6 | A Cherkasov A Olhovskiy | 4 | 4 | ||||||||||||||||||||||
| V Flégl D Vacek | 6 | 6 | V Flégl D Vacek | 6 | 6 | ||||||||||||||||||||||
| D Buljević E Rasberger | 2 | 3 | V Flégl D Vacek | 6 | 6 | ||||||||||||||||||||||
 H de la Pena B Uribe | 7 | 6 | H de la Pena B Uribe | 4 | 4 | ||||||||||||||||||||||
| 4 | G Bloom N Pereira | 5 | 2 | V Flégl D Vacek | 4 | 7 | 7 | ||||||||||||||||||||
| L Pimek F Roig | 6 | 7 | L Pimek F Roig | 6 | 6 | 5 | |||||||||||||||||||||
 J Pino M Tabares | 1 | 5 | L Pimek F Roig | 4 | 6 | 6 | |||||||||||||||||||||
| E Bengoechea M Ingaramo | 1 | 6 | 6 | E Bengoechea M Ingaramo | 6 | 3 | 3 | ||||||||||||||||||||
| 2 | A Mora B Page | 6 | 0 | 2 | |||||||||||||||||||||||
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