CINCINNATI -- American John Isner reached his seventh semifinal of the year after upsetting World No. 1 Novak Djokovic at the 2013 Western & Southern Open on Friday. Djokovic, who lost 7-6(7), 3-6, 7-5, was attempting to become the first ATP Player to win all nine Masters 1000 tournaments and earn a Career Golden Masters. The Western & Southern Open is the only Masters event missing from Djokovic's trophy case; he will have to go another year without this distinction.

 

"I'm disappointed because I really wanted to win," said Djokovic in his press conference after the match. "But it's sport; I'll move on."

 

Isner credited some of his win today - which takes him to a 15-3 record for the summer hard court season - to the fans who cheered him on. "It was just so much fun to play out there. It's one of the reasons why I work so hard," said Isner, "to be able to be in a situation like that and to sort of enjoy it."

 

Juan Martin del Potro also needed three sets before advancing against Russian qualifier Dmitry Tursunov 6-4, 3-6, 6-1. "I made many aces [today]," said Del Potro. "I'm looking forward to tomorrow."

 

Tomas Berdych upset No. 2 Andy Murray 6-3, 6-4. The Czech awaits the winner of Friday night's highly anticipated match-up between Roger Federer and Rafael Nadal.

 

In the women’s draw, Jelena Jankovic made quick work of Roberta Vinci. The former World No. 1, who won 6-0, 6-4, has been working on her net game by playing doubles this year. "The reason I started playing doubles is because I want to improve my singles game," said Jankovic after the match. "Against Vinci, I was coming in a lot to the net, pretty much every other point, or every point." Jankovic will face the winner of a Friday night match between Caroline Wozniacki and Victoria Azarenka.

 

Serena Williams will face Li Na in the semifinals after her 6-0, 6-4 win over Simona Halep.

 

In men's doubles, the Spanish team of Marcel Granollers and Marc Lopez is through to the semifinals after taking out the Polish team of Mariusz Fyrstenberg and Marcin Matkowski. The Spaniards will face the No. 8 team of Bopanna and Roger-Vasselin, who took the super tie-break 10-8 to win against Leander Paes and Radek Stepanek.