Germany's Andrea Petkovic reached the French Open semi-finals on Wednesday as she overpowered 10th seed Sara Errani of Italy 6-2, 6-2.
The Bosnian-born outsider, who is the lowest seed in the women's draw at 28, reaches her first Grand Slam semi-final after having made the quarter-finals at Australia, Roland Garros and the US Open in 2011.
Errani won the first two games of the match before Petkovic reeled off six games in a row to take the opening set 6-2 in 27 minutes.
Behind a first serve percentage of over 90 per cent, the 26-year-old who reached a personal high of world number nine in 2011 before a spate of injuries derailed her career, broke Errani's serve seven times in total, as she wrapped up the match in just over an hour.
Petkovic will meet either Romanian fourth seed Simona Halep or 2009 champion Svetlana Kuznetsova of Russia for a place in the final.