| 1999 Grolsch Open | ||||
|---|---|---|---|---|
| Date | 2–8 August | |||
| Edition | 42nd | |||
| Category | World Series | |||
| Draw | 32S / 16D | |||
| Prize money | $475,000 | |||
| Surface | Clay / outdoor | |||
| Location | Amsterdam, Netherlands | |||
| Champions | ||||
| Singles | ||||
 Younes El Aynaoui[1] | ||||
| Doubles | ||||
 Sjeng Schalken /Paul Haarhuis[2] | ||||
| ||||
The1999 Grolsch Open, also known as theDutch Open, was anATP men'stennis tournament played on outdoorclay courts inAmsterdam, Netherlands that was part of theWorld Series of the1999 ATP Tour. It was the 42nd edition of thetournament and was held from 2 to 8 August. Sixth-seededYounes El Aynaoui won the singles title.
Younes El Aynaoui defeated
Mariano Zabaleta 6–0, 6–3
Sjeng Schalken /Paul Haarhuis defeated
Devin Bowen /
Eyal Ran 6–3, 6–2