American qualifier Bethanie Mattek-Sands has finished off Kristina Barrois of Germany with her 10th ace to secure a 7-6 (3), 6-2 win and reach the second round of the Open GDF Suez.

Barrois rallied from a 4-1 deficit to force a first-set tiebreaker. But Mattek-Sands won six straight points to take the first set before breaking Barrois twice in the second.

Roberta Vinci of Italy, Klara Zakopalova of the Czech Republic and Monica Niculescu of Romania also advanced.

The seventh-seeded Vinci beat Simona Halep of Romania 6-4, 6-4.

Niculescu outlasted Jarmila Gajdosova of Australia 6-1, 4-6, 6-4 in an erratic match that saw 14 service breaks.

Zakopalova cruised past French wild card Alize Cornet 6-3, 6-1 by winning eight straight games to take the first set and a 5-0 lead in the second.