S Wawrinka pulled off the upset to defeat Federer. S Wawrinka entered the match as the underdog, with a 33% chance to win before the match started.
From the outset, S Wawrinka refused to go away, chipping away at Federer's lead until S Wawrinka took their first lead during the middle stretches of the match. Federer never recovered after losing the lead, and by the time the match ended, S Wawrinka had earned the upset.