1990 Rosmalen Grass Court Championships
Date	11–17 June
Edition	1st
Category	ATP World Series
Draw	32S / 16D
Prize money	$225,000
Surface	Grass / outdoor
Location	Rosmalen, Netherlands
Champions
Singles
Amos Mansdorf[1]
Doubles
Jakob Hlasek / Michael Stich[2]
Rosmalen Grass Court Championships · 1991 →

The 1990 Continental Grass Court Championships was a men's ATP-tennis tournament held in Rosmalen, Netherlands. It was played on outdoor grass courts and was part of the ATP World Series. It was the inaugural edition of the tournament and was held from 11 June through 17 June 1990. Unseeded Amos Mansdorf won the singles title.

Finals

Singles

Amos Mansdorf defeated Alexander Volkov 6–3, 7–6

• It was Mansdorf's only singles title of the year and the 5th of his career.

Doubles

Jakob Hlasek / Michael Stich defeated Jim Grabb / Patrick McEnroe 7–6, 6–3