Lucky number 700 for Serena Williams

    (CNN)Tennis great Serena Williams racked up her 700th WTA win at the Miami Open on Wednesday, becoming the second player in as many days to be presented with a giant, brightly-colored cake after Andy Murray reached 500 wins on Tuesday.

    World No. 1 Williams looked to be heading for a surprise defeat against Sabine Lisicki as she surrendered six straight games in the second set having won a tight opener.
      But the American rallied to overcome the 21st-ranked German 7-6 1-6 6-3 in a little over two hours and celebrated with a hard-earned slice of cake.
        "I had no idea," said Williams, who last year won a record seventh Miami title. "I saw them bringing out a cake and I thought, 'Whose birthday is it today?' But I really had no idea about (the milestone)."
        A 19-time grand slam winner, Williams has raked in more than $65 million in prize money.
        It hasn't all been plain sailing however -- in 2010 doctors found a life-threatening blood clot in her lungs resulting in the star taking a break from competition for 12 months.
        Yet to lose a match in 2015, the reigning Australian and U.S. Open champion is writing her name across the history books, although she still has a long way to go to beat Martina Navratilova's record of 1,442 match wins -- the leading mark in both the men's and women's game.