World No.7 Stan Wawrinka was sensationally knocked out of the Marseille Open on Friday as he went down in the quarter-finals against Sergiy Stakhovsky in three sets.

Ukraine’s Stakhovsky, the world No.59, carved out a 6-4 3-6 6-4 victory over the Swiss former Australian Open winner, and now meets Frenchman Gilles Simon.

World No.17 Simon shrugged off a slow start to subdue compatriot Jeremy Chardy 7-5 7-6 (8-6) and set up a last-four match-up against Stakhovsky.

In the second semi-final, seventh seed and home favourite Gael Monfils will play Spaniard Roberto Bautista, the fourth seed, for a place in Sunday’s championship match.