Novak Djokovic

Six-time champion Novak Djokovic "ran out of gas" in a straight sets loss to Benoit Paire, while the red-hot Juan Martin Del Potro won his opening match at the ATP Miami Masters. It was another setback for the Serbian star Djokovic as he bids to return from the elbow injury that sidelined him for six months and finally saw him have "minor" surgical intervention after a disappointing Australian Open. "I'm trying, but it's not working," said Djokovic, who lost his opener 6-3, 6-4. "That's all it is. I mean, obviously I'm not feeling great when I'm playing this way."

"Of course I want to be able to play as well as I want to play. Just, it's impossible at the moment. That's all." While Djokovic is struggling, world number six Del Potro is headed in the opposite direction. The 29-year-old Argentine showed why he is the hottest player on the ATP Tour right now with a 4-6, 7-5, 6-2 win over Robin Haase in his second round match. Paire broke Djokovic at love to seal the win, Djokovic dumping a backhand into the net on the Frenchman's first match point.