Wozniacki downs Petkovic to make semis

World No 1 Caroline Wozniacki avenged her shock Miami defeat to Andrea Petkovic by battling back to beat the German crowd favourite 6-4, 6-1 and reach the Stuttgart semi-finals on Thursday.


Wozniacki

Despite finding herself 4-1 down after just 21 minutes of the first set, the 20-year-old Danish top seed roared back to break Petkovic, ranked 19th in the world, three times to take the opener.

Petkovic then ran out of steam and the 23-year-old had few answers as Wozniacki blazed into a 5-0 lead in the second set.

"It was tough for me to come back in the first set," admitted Wozniacki, who has won her last seven matches after also winning the Charleston tournament.

"I am sorry I beat the home favourite, but I hope the crowd will support me now. Wozniacki will now play Poland's Agnieszka Radwanska in today's semi-final after the 22-year-old needed two hours to beat German wild-card Kristina Barrois 7-5, 6-3.