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Stanislas Wawrinka knocks out Roger Federer at French Open – as it happened | French Open 2015 | The Guardian
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US Open 2019: Stan Wawrinka advances to quarter-finals as Djokovic retires, Federer cruises to set up clash against Grigor Dimitrov-Sports News , Firstpost
![Switzerland's Stanislas Wawrinka returns the ball to Poland's Jerzy Janowicz during their third round match of the French Open tennis tournament at the Roland Garros stadium Saturday, June 1, 2013 in Paris. ( Switzerland's Stanislas Wawrinka returns the ball to Poland's Jerzy Janowicz during their third round match of the French Open tennis tournament at the Roland Garros stadium Saturday, June 1, 2013 in Paris. (](https://c8.alamy.com/comp/2N7D2K3/switzerlands-stanislas-wawrinka-returns-the-ball-to-polands-jerzy-janowicz-during-their-third-round-match-of-the-french-open-tennis-tournament-at-the-roland-garros-stadium-saturday-june-1-2013-in-paris-ap-photomichel-euler-2N7D2K3.jpg)