Wheelchair tennis star Esther Vergeer says she is retiring immediately, bringing to an end one of sport's longest winning streaks and a career peppered with Grand Slam and Paralympic titles.
Vergeer tweeted on Tuesday that it was a special day as she has "officially stopped tennis."
The 31-year-old Dutchwoman took a break from the sport last year to consider her future after winning her fourth straight Paralympic title in wheelchair singles with a 6-0, 6-3 victory over Aniek van Koot, taking her remarkable nine-year winning streak to 470 matches.
Vergeer went to No. 1 in the wheelchair rankings in 1999 and never relinquished the top spot.
The last time she lost a match was to Daniele di Toro in Sydney on Jan. 30, 2003.