STOCKHOLM, July 7 (Xinhua) -- Flavia Pennetta of Italy stormed into the quarterfinals of the Swedish Open by beating Sloane Stephens of the United States 6-1, 6-1 in Bastad on Wednesday.

The top-seeded Pennetta will next face veteran Jill Craybas, who defeated Anna-Lena Groenefeld of Germany 3-6, 6-0, 6-4.

Second-seeded Aravane Rezai of France beat Renata Voracova of the Czech Republic 6-4, 6-2 in the day's other game.

Also, Lucie Safarova of the Czech Republic had to come from behind to beat Karolina Sprem of Croatia 2-6, 7-5, 6-3.

Barbora Zahlavova Strycova of the Czech Republic won the final match of the day against Akgul Amanmuradova of Uzbekistan, 3-6, 6-4, 6-0.