Azarenka beats Serena in 3 sets to join Osaka in Final
After a bad start, the Belarusian stepped up her game and was then too strong.
US Open 
134e, 555 points
Non classé
Williams S • 3
Azarenka V
6
3
3
1
6
6
16e, 2487 points
Osaka N • 4
Azarenka V
1
6
6
6
3
3