Serena Williams was forced to retire from her first match at the 2007 Sony Ericsson Championships because of a left knee injury. Having lost the opening set 4-6, Williams shook hands with Chakvetadze, and left the court in tears.
The Russian was sad that she won the match in this way, but the triumph is very important to her since it keeps her in competition for the semifinals (Chakvetadze lost her first match at the WTA Championships to defending champion Justine Henin).
I still don't know if Serena will be able to quickly recover from the injury and continue to compete at the season-ending Championships, but if not, Marion Bartoli will take her place as she is the first alternate. (photo via Getty Images)