Tennis: Cilic and Nishikori set for U.S. Open rematch

Tennis: Cilic and Nishikori set for U.S. Open rematch
Kei Nishikori of Japan returns a shot to Sam Groth of Australia during the Citi Open at Rock Creek Park Tennis Center on August 7, 2015 in Washington, DC.

Marin Cilic and Kei Nishikori will meet in the semi-finals at the Citi Open in Washington on Saturday, their first encounter since the final of last year's U.S. Open.

The other semi-final will see American John Isner meet compatriot Steve Johnson after eighth-seed Isner defeated Ricardas Berankis of Lithuania 6-3 5-7 6-3, while Johnson upset 15th-seed Jack Sock 7-6 6-1.

Third-seed Cilic beat German teenager Alexander Zverev 7-5 7-6 in quarter-final action on Friday, while second-seed Nishikori ended the run of Australian qualifier Sam Groth 6-4 6-4.

Japan's Nishikori has beaten Cilic in five of their eight head-to-head matches, but in their last meeting at Flushing Meadows last September the Croatian prevailed in straight sets (6-3 6-3 6-3) to win his first Grand Slam title.

Nishikori has been one of the strongest players this season. He has moved up to No. 5 in the world rankings with a 41-9 record. Only Novak Djokovic (48-3) and Andy Murray (48-8) have more match wins on the 2015 ATP World Tour.

"Hopefully, I can get some revenge against Marin," Nishikori said.

"I've been playing good here and hopefully I can come up with another good one in the semis tomorrow."

Nishikori survived eight aces against the hard-serving Groth, who reached 147 mph (236 kph) with his serve.

"It's great to be back in the semi-finals here and to have a chance to play against Kei in the United States," world number eight Cilic said.

"It's a great way to start the summer hardcourt season, and I feel that my form is getting better match after match."

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