| 1990 Czechoslovak Open | |
|---|---|
| Date | 6–12 August |
| Edition | 4th |
| Category | World Series |
| Draw | 32S / 16D |
| Prize money | $148,400 |
| Surface | Clay / outdoor |
| Location | Prague, Czechoslovakia |
| Venue | I. Czech Lawn Tennis Club |
| Champions | |
| Singles | |
 Jordi Arrese[1] | |
| Doubles | |
 Vojtěch Flégl /Daniel Vacek[2] | |
The1990 Czechoslovak Open, also known as thePrague Open was a men'stennis tournament played onoutdoor clay courts at theI. Czech Lawn Tennis Club inPrague, Czechoslovakia that was part of theATP World Series (Designated Week) of the1990 ATP Tour. It was the fourth edition of the tournament and was held from 6 August until 12 August 1990. Eighth-seededJordi Arrese won the singles title.[3]
Jordi Arrese defeated
Nicklas Kulti 7–6, 7–6
Vojtěch Flégl /Daniel Vacek defeated
George Cosac /Florin Segărceanu 5–7, 6–4, 6–3