Vergeer announces retirement
Esther Vergeer, who has dominated women's wheelchair tennis over the past decade, has announced her retirement.
The 31-year-old amassed a remarkable 470-match winning run over nine years and won 21 grand slam singles crowns and three Paralympic titles.
The Dutchwoman has not played since announcing she was to take a break from the sport after the 2012 London Paralympics and Tweeted on Tuesday that she has "officially stopped tennis".
International Tennis Federation president Francesco Ricci paid tribute to Vergeer.
He said: "Esther Vergeer is a tremendous ambassador not only for tennis but also for disability sports. She is an inspiration to many.
"Wheelchair tennis owes her a huge debt of gratitude for her professionalism and her quality as a player.
"Everyone at the ITF wishes her well with her Foundation and we know that anything she chooses to do in the future will be a success.
"While we will certainly miss her, we will have one more chance to honour her as our ITF World Champion, for a record 13th time, at the ITF World Champions Dinner in Paris."