Serena Williams won a record seventh Key Biscayne title Saturday when she overcame a slow start and a set point to beat Li Na 7-5, 6-1 at the Sony Open. Williams surpassed the tournament record of six titles she shared with Andre Agassi. But on a muggy spring afternoon, the No. 1-ranked Williams looked sluggish at the outset and served poorly, and she was broken twice to fall behind 5-2. ''At that moment I felt like I had nothing to lose,'' Williams said. More...