By Chris Oddo | Friday, August 15, 2014

Jack Sock and Vasek Pospisil—known to many as #PospiSock—won their 13th consecutive match on Friday in Cincinnati, defeating second-seeded Alexander Peya and Bruno Soares, 6-2, 5-7, 10-7, to become the first team in the history of ATP doubles to begin a partnership with 13 consecutive wins.

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The previous record-holders, American Paul Annacone and South African Christo van Rensburg, won their first 12 matches in 1984 and 1985. They began their partnership in 1984 by winning Sydney. They then won Delray Beach at the beginning of 1985 before losing at Houston in the quarterfinals.

Sock and Pospisil started their run with a Wimbledon title, then won Atlanta two weeks ago. They’ve now reached the semifinals of the Western and Southern Open after another clutch performance in a match tiebreak.

“It’s a pretty good start,” said Pospisil, during an interview with ESPN after the match, with a smile. “We gel really well together. We seem to click at the right times when we need to.”

During the run the American-Canadian pairing have a 5-0 record in deciders as well as a 3-0 record in match tiebreaks. They own two wins over Peya and Soares, the No. 3-ranked team in the world, two wins over Leander Paes and Radek Stepanek, who are two-time Grand Slam champions as a team, and one win (in the Wimbledon final) over the legendary tandem of Mike and Bob Bryan.

“We get along well,” said Sock. “We joke around and keep it loose. We play loose, and we’re able to go after our shots and play big, and I think that’s a big part of our success.”

#Pospisock will look to keep the ball rolling in Saturday’s semifinals, where they’ll face either Daniel Nestor and Nenad Zimonjic or Edouard Roger-Vasselin and Julien Benneteau.

Racquet clap to Stephanie Myles of Busted Racquet for this piece on the duo.