Ern Gulbis pulled off a surprising upset to defeat Del Potro. Ern Gulbis entered the match as the decided underdog, with a 13% chance to win before the match started.
From the outset, Ern Gulbis refused to go away, chipping away at Del Potro's lead until Ern Gulbis took their first lead during the middle stretches of the match. Del Potro never recovered after losing the lead, and by the time the match ended, Ern Gulbis had earned the upset.