Tennis-Stosur to retire after Australian Open

FILE PHOTO: Tennis - Australian Open - Melbourne Park, Australia - 17/1/14 Women's Singles - Australia's Sam Stosur in action during her third round match Mandatory Credit: Action Images / Jason O'Brien Livepic

(Reuters) - Former U.S. Open champion Sam Stosur on Saturday said she will retire from the sport following this month's Australian Open, 21 years after her first appearance at Melbourne Park.

Ahead of last year's Australian Open, the 38-year-old said that she would focus only on doubles.