Sharapova wins as Cornet pulls out

Maria Sharapova was a quick-fire winner in the Porsche Grand Prix in Stuttgart today when French opponent Alize Cornet retired just 50 minutes into their second round match.

Sharapova, seeded two, had won the first set 6-3 and taken the opening game of the second before Cornet signalled she could not continue, handing the Russian a place in the last eight.

Also in the second round, in-form fourth seed Agnieszka Radwanska advanced with a 6-3 6-4 win over qualifier Greta Arn of Hungary, breaking her opponent four times in their 78-minute match.

Jelena Jankovic was another retirement, pulling out when trailing 6-3 1-0 to sixth seed Caroline Wozniacki in their first round match. There were first round wins for Mona Barthel of Germany and Akgul Amanmuradova of Uzbekistan.