Victoria Azarenka collapsed and had to be taken off the court in a wheelchair Wednesday, an accident that resulted from a concussion she endured after falling and hitting her head while warming up for her U.S. Open match. The 10th-seeded Belarusian was trailing Gisela Dulko 5-1, 31 minutes into her match on another steamy day at Flushing Meadows, when she stopped running and crumpled to the ground. She was taken to the hospital for tests, diagnosed with a mild concussion. A scary scene on a day in which the temperature had already reached 90 degrees when the accident occurred at 11:30 a.m. However, the 21-year-old released a statement saying it was a head injury, not the heat, that set her up for the fall. "I was warming up in the gym prior to my match against Gisela Dulko when I fell while running a sprint," she said. "I fell forward and hit my arm and head. I was checked by the medical team before I went on court and they were courtside for monitoring. I felt worse as the match went on, having a headache and feeling dizzy. I also started having trouble seeing and felt weak before I fell." http://sports.espn.go.com/sports/tennis/usopen10/news/story?id=5519516
