2019 Libéma Open – Men's singles

Men's singles
2019 Libéma Open
Champion Adrian Mannarino
Runner-up Jordan Thompson
Score7–6(9–7), 6–3
Draw28 (4 Q / 3 WC )
Seeds8

Adrian Mannarino defeated Jordan Thompson in the final, 7–6(9–7), 6–3 to win the men's singles tennis title at the 2019 Rosmalen Grass Court Championships. It was Mannarino's maiden ATP Tour singles title in his seventh final. Thompson was also contesting for his maiden title.

Richard Gasquet was the defending champion, but lost to Thompson in the semifinals.