AUSTRALIA'S Samantha Stosur has crashed out of the French Open, suffering a shock three-set semi-final defeat to Italy's Sara Errani at Roland Garros.
Errani, the 21st seed, had never beaten sixth seed Stosur in five previous meetings, but she held her nerve in a tight, rain-delayed match on Court Phillippe Chatrier to win 7-5, 1-6, 6-3 in just over two hours.
The women's title decider will see Errani face Russian Maria Sharapova, who regained the world number one ranking for the first time in four years by making her first French Open final.
The second seed knocked out Czech fourth seed Petra Kvitova 6-3, 6-3 as she aims to complete a career Grand Slam, having won titles at Wimbledon in 2004, the US Open in 2006 and the Australian Open in 2008.
Stosur - who was trying to earn a place in her third career grand slam final - had far more winners than Errani, but her 48 unforced errors to her opponent's 21 proved the difference.