Sources say Nicole Vaidisova has retired at the age 20 and will marry fellow Czech player Radek Stepanek in July.
A former top-10 player and winner of six WTA titles, the big-hitting Vaidisova reached the semifinals of the 2006 French Open and 2007 Australian Open before falling on hard times.
She went 11-17 in 2009 and will end her career ranked No. 176, well below her career high of No. 7 in May 2007. She is said to have tired of losing and lacks the desire to grind her way back.—Matthew Cronin