Stan Wawrinka, the No. 22 seed, hits 26 winners past Ruben Bemelmans on Monday in the Wimbledon first round.

Stan Wawrinka, the No. 22 seed, hits 26 winners past Ruben Bemelmans on Monday in the Wimbledon first round.

Stan Wawrinka had his slides on the grass but still managed to beat Daniel Evans on Wednesday at The Queen's Club.

Seventh seed Stan Wawrinka completes a rain-interrupted win over in-form Daniel Evans on Wednesday at The Queen's Club.

Former World No. 3 Stan Wawrinka falls just short of reaching his fourth Roland Garros semi-final.

Roger Federer takes a 23-3 lead in his FedEx ATP Head2Head series with Stan Wawrinka with a four-set win in Paris.

Stan Wawrinka is going for his second Roland Garros title this fortnight.

Stan Wawrinka celebrates his third-round victory over Grigor Dimitrov at Roland Garros.

Stan Wawrinka helps a child after his second-round match at Roland Garros on Wednesday.

Stan Wawrinka, the No. 24 seed and 2015 champion, hits 48 winners past Jozef Kovalik on Monday at Roland Garros.

Stan Wawrinka is looking to reach his first ATP Masters 1000 semi-final since March 2017.

Stan Wawrinka, the 2013 champion, breaks a three-match Madrid losing streak to beat Pierre-Hugues Herbert on Tuesday.

Stan Wawrinka advances to the second round at the 2019 BNP Paribas Open.

Former World No. 3 Stan Wawrinka reached the final in Indian Wells two years ago.

Stan Wawrinka continues his 2019 resurgence with a straight-sets win over seventh seed Steve Johnson in Acapulco.

Stan Wawrinka hits 26 winners in his straight-sets win against Ryan Harrison in Acapulco.

Former World No. 3 Stan Wawrinka could face top seed Rafael Nadal in the Acapulco quarter-finals.

Gael Monfils, who beat Stan Wawrinka (right) in the 2019 ABN AMRO World Tennis Tournament final on Sunday, poses for photos with Tournament Director Richard Krajicek.

Stan Wawrinka, the 2015 champion, strikes a forehand against Gael Monfils in the 2019 ABN AMRO World Tennis Tournament final in Rotterdam on Sunday.

Stan Wawrinka defeats Kei Nishikori in three sets at the ABN AMRO World Tennis Tournament on Saturday.

Stan Wawrinka, the 2015 champion, strikes a backhand back to No. 10 seed Denis Shapovalov on Friday in Rotterdam.

Stan Wawrinka defeats Milos Raonic in straight sets at the ABN AMRO World Tennis Tournament on Wednesday.

Stan Wawrinka rallies from an early deficit to defeat Benoit Paire in Rotterdam.

Former champion Stan Wawrinka owns a 6-2 record at the ABN AMRO World Tennis Tournament.

Stan Wawrinka will pursue his first title since Geneva in 2017 when he competes in Sofia this week.