Determined to rebound from a nagging injury that forced him to withdraw early from Wimbledon, Kei Nishikori advanced to the semifinals of the Citi Open in Washington D.C. with a straight set victory over Sam Groth of Australia.
Second seed Kei Nishikori of Japan captured the Citi Open, defeating towering American eighth seed John Isner 4-6, 6-4, 6-4 in Sunday’s final and avenging his loss in this year’s Miami Masters quarterfinals.
Nishikori won both prior meetings with Mayer at Grand Slams without dropping a set, in the second round at Wimbledon in 2013 and last year in the third round at Flushing Meadows on his way to the final, where he lost to Marin Cilic.