Samantha Stosur has missed out on a semi-final berth at the Ladies Open Lausanne after a straight-sets defeat to Fiona Ferro.

Australian No.5 Stosur had scored a morale-boosting 6-3 7-5 win over American Allie Kiick the day before to repeat her effort at last year’s tournament in making the last eight.

But the 2011 US Open champion, now world ranked at 134, was unable to maintain her momentum on Friday, suffering an 80-minute defeat to Ferro.

The 98th-ranked Frenchwoman, who reached her second semi-final of the season now faces Bernarda Pera, who beat China’s Xinyun Han 6-0 5-7 6-3.

Defending champion Alize Cornet recovered from a set down to beat Natalia Vikhlyantseva and earn her place in the last four of the clay court tournament, coming through 4-6 6-1 6-3.

The French player will next meet Tamara Korpatsch who saw off Jil Teichmann 3-6 6-0 6-1.