Wozniacki win first set 6-2. Just because she made less errors than Oudin. She made FOUR winners and 11 UE. Oudin made FIVE winners and 18 UE.
Wozniacki can win second set surely if she cut her UE into half.
Basically, part of OUdin success recipe against three seeded players were the donation of UE and DF from the Russian girls. And Oudin just defending and attacking sometimes. But with Wozniacki who had the same style as her, she had to attack to get points cause Wozniacki did not gave tons of cheap points.
Oudin hope for Wozniacki to melt down in second set and started to made tons of UE for her to win second set.