Müller led 5-2 in the second set tiebreak
In the deciding game, the 27-year-old, thanks in particular to a forehand winner, an ace and a good return followed at the net, led 5-2, two serves to follow. But he committed two avoidable errors, one on the backhand, the other on the forehand. Behind, Zverev chained two service winners then a backhand return winner to win a set that had started badly.