Victoria Azarenka collapses in match. http://sports.espn.go.com/sports/tennis/usopen10/news/story?id=5519516
Check out this article and clip from the Today Show (8/30/10) that discusses the importance of recognizing these injuries.
Please visit the following link, and read the story that was on the front page of the News & Observer on Sunday, June 20. Concussions steal memory and dreams by Tim Stevens