Caroline Wozniacki trusts her stamina so much that she plans to return to New York in two months to run a marathon. Maria Sharapova, usually the one wearing down opponents in the third set, sure couldn't keep up on a steamy Sunday at the US Open. Wozniacki won 6-4, 2-6, 6-2 in 2 hours, 37 minutes to get back to her first Grand Slam quarterfinal in more than two years -- and get back in the headlines for reasons other than her personal life. "It's been an up and down year for me," Wozniacki said in quite the understatement. Read more http://espn.go.com/tennis/usopen14/story/_/id/11444490/2014-us-open-women-play
