` Normally she 's with me on my side of the net and not on the other one , so to see her on the other side Roberta Vinci beats No . 7 seed Samantha Stosur at Dubai Championships . Unseeded Italian will now play doubles partner and 'sister ' Sara Errani . Petra Kvitova knocks out No . 7 seed Sara Errani . Samantha Stosur into quarterfinals at the last eight in France .
Roberta Vinci beats No . 7 seed Samantha Stosur at Dubai Championships . Unseeded Italian will now play doubles partner and 'sister ' Sara Errani . Petra Kvitova knocks out No . 7 seed Sara Errani . Samantha Stosur into quarterfinals at the last eight in France .