Comeback German girl Andrea Petkovic toppled top seed Nina Bratchikova of Russia while Japanese veteran Kimiko Date-Krumm shocked compatriot and second seed Misaki Doi to storm into the semi-finals of

World number one Caroline Wozniacki suffered a surprise fourth-round defeat by Germany's Andrea Petkovic in the Sony Ericsson Open on Monday, falling victim to a smart strategy from her lower-ranked o

Jan. 23: Germany’s Andrea Petkovic upset 2008 champion and 16th seed Maria Sharapova of Russia 6-2, 6-3 in the fourth round of the Australian Open on Sunday. Petkovic reached the quarterfinals of a Gr