1990 Rosmalen Grass Court Championships – Singles

In the inaugural edition of the tournament, Amos Mansdorf won the title after defeating Alexander Volkov 6–3, 7–6 in the final.

Seeds
• # 🇫🇷 Yannick Noah (first round)

• # Karel Nováček (first round)

• # Jakob Hlasek (second round)

• # Paul Haarhuis (first round)

• # 🇺🇸 Richey Reneberg (semifinals)

• # 🇺🇸 Jim Grabb (second round)

• # (n/a)

• # 🇺🇸 Dan Goldie (second round)