Marseille - World number seven Stan Wawrinka was sensationally knocked out of the Marseille Open on Friday as he went down in the quarter-finals against world number 59 Sergiy Stakhovsky in three sets.
Ukraine's Stakhovsky carved out a 6-4, 3-6, 6-4 victory over the Swiss former Australian Open winner, and now meets Frenchman Gilles Simon.
World number 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.
Results from the fifth day of the ATP Marseille Open on Friday (x denotes seeding):
Gael Monfils (FRA x7) bt Simone Bolelli (ITA) 6-4, 6-4
Roberto Bautista (ESP x4) bt Dominic Thiem (AUT) 7-6 (9/7), 6-3
Sergiy Stakhovsky (UKR) bt Stanislas Wawrinka (SUI x2) 6-4, 3-6, 6-4
Gilles Simon (FRA x5) bt Jeremy Chardy (FRA) 7-5, 7-6 (8/6)