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.

Stan Wawrinka will face 2018 Sofia runner-up Marius Copil in the first round.

Stan Wawrinka will try to win his second Australian Open title this fortnight (2014).

Former champion Stan Wawrinka will meet Ernests Gulbis in the first round at the Australian Open.

Stan Wawrinka will play Roberto Bautista Agut in the Doha quarter-finals after beating Nicolas Jarry on Wednesday.

Stan Wawrinka saves all four break points he faces to oust Karen Khachanov in Doha.

Stan Wawrinka extends his FedEx ATP Head2Head series lead against Karen Khachanov to 2-0 with a win in Doha on Tuesday.

Karen Khachanov and Stan Wawrinka, who will meet in the Doha first round, have only clashed once previously, a match won by Wawrinka.

Novak Djokovic, Dominic Thiem, Stan Wawrinka and Karen Khachanov wear traditional Qatari men's attire while walking the Katara Beach on Sunday.

Karen Khachanov and Stan Wawrinka will clash against one another in the first round in Doha.

Stan Wawrinka advances to his first semi-final since February with a victory against defending champion Damir Dzumhur.

Stan Wawrinka beats Karen Khachanov during their first FedEx ATP Head2Head meeting on Wednesday in St. Petersburg.

Stan Wawrinka will next play in-form Russian Karen Khachanov for a spot in the St. Petersburg Open quarter-finals.

Stan Wawrinka defeats Aljaz Bedene to extend his lead in their FedEx ATP Head2Head series to 3-1.

Stan Wawrinka will face Aljaz Bedene in the first round of the St. Petersburg Open on Monday.

Stan Wawrinka extends his US Open win streak to nine straight, advancing to the third round.

Stan Wawrinka defeats Grigor Dimitrov for the fourth time in eight FedEx ATP Head2Head meetings at the US Open on Monday.

Stan Wawrinka battles Roger Federer on Friday at the Western & Southern Open in Cincinnati.

Stan Wawrinka claimed three consecutive breaks of serve against Kei Nishikori.

Stan Wawrinka earns his third Top 20 win of the season, upsetting 12th seed Diego Schwartzman in Cincinnati.

Stan Wawrinka comes from a set down to beat Nick Kyrgios at the Rogers Cup on Tuesday.