Kei Nishikori says he hopes to be back to his best for the US Open at the end of August.

Nishikori keen to make impact in US Open

Nishikori keen to make impact in US Open

The Japanese star, who is ranked eighth in the world, has struggled with injury this season and only made it to the third round at Wimbledon, where he lost

to Spaniard Roberto Bautista Agut.

The 27-year-old, whose best performance in the final Grand Slam of the year came in 2014 when he finished as runner-up, says he hopes to be fully fit and

firing for Flushing Meadows.

Nishikori said: "I am really looking forward to the summer season. I want to regain my confidence on the hard courts and be in tip-top condition."

Nishikori was also asked about the next Olympics, which is being held in Tokyo in his home country, and he admits he's already looking forward to the fight for a gold medal.

He added: "It is a long way to go (until Tokyo 2020) but if I strengthen my body over these next two or three years then I think I can head into what will be

a good period for me.

"I will have the advantage of playing at home and would like to try again for a medal."

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