Kamil Majchrzak defeated Alex de Minaur in the final, 6–3, 2–6, 7–6(7–5) to win the men's singles tennis title at the 2026 Rosmalen Grass Court Championships. It was his first ATP Tour title. He was just the second man to earn three top-10 wins en route to an ATP 250 title, since the series began, after Grigor Dimitrov at the 2017 Brisbane International.
Gabriel Diallo was the defending champion, but lost in the first round to Adrian Mannarino.
Aged 17 years and 11 months, Thijs Boogaard became the second-youngest player to win a main draw match in tournament history.
Seeds The top four seeds received a bye into the second round.
Draw
Finals
Top half
Bottom half
Qualifying Seeds
Qualifiers
Qualifying draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
References
External links Main draw Qualifying draw