Troicki won the first set 6 - 3 .
Wawrinka turned the situation to his favor by winning three other sets of 6 - 2 , 6 - 2 , 7 - 6 .
Troicki won the first set 6 - 3 , but Wawrinka turned the situation to his favor by winning three other sets of 6 - 2 , 6 - 2 , 7 - 6 .