Frenchman Richard Gasquet reached the last four at the Halle Open on Friday (June 23), edging past Dutchman Robin Haase 6-1 3-6 6-1.
Haase had eliminated second seed Dominic Thiem in the previous round and looked to be hitting top grasscourt form at just the right time.
Gasquet will play the winner of the last quarter-final between local favourite Alexander Zverev and Spaniard Roberto Bautista-Agut later on Friday.
In an all-Russian quarter-final, Karen Khachanov beat Andrey Rublev 7-6(8) 4-6 6-3 to reach his first tour semi-final of the year.
He will now face 18-time grand slam champion Roger Federer, who cruised past defending champion Florian Mayer 6-3 6-4.
