Player collapses at US Open

New York - Number ten seed Victoria Azarenka collapsed on court in the searing heat at the US Open on Wednesday during her second-round match against Gisela Dulko.

Azarenka slumped to the ground while 1-5 (15-30) down on the Grandstand court and, after receiving medical treatment, was taken off in a wheelchair.

The Belarussian appeared to struggle as early as the third game when the trainer was called. She received treatment for an apparent arm injury but also complained of blurred vision.

It became increasingly clear that the 21-year-old was in difficulty as she took time out between every subsequent point and was ill at ease on her feet.

Then, while serving for the fourth time in the match, she collapsed on the baseline, leading to gasps from the crowd, and forcing her retirement from the tournament.