Wednesday 7 September 2016 11:31, UK
Andy Murray has revealed a good night's sleep has helped his preparation for Wednesday's US Open clash against Kei Nishikori with a semi-final spot up for grabs.
Britain's number one brushed aside Grigor Dimitrov on Monday after a laboured victory over Italy's Paolo Lorenzi in the previous round, with questions raised over possible fatigue.
Murray is wary that Nishikori will back himself at Flushing Meadows, where the Japanese has reached his only Grand Slam final [2014], but Murray believes he has recaptured his own best tennis ahead of the quarter-final.
Murray said: "I've not been sleeping great since I've been here. I don't know why. But on Sunday night I tried to get in bed early and I slept for 12 hours straight.
"I never do that. I never sleep that long. I went to bed very early. I played a really good match against Kei when we played a few weeks ago. I'm aware I'll need to do that again if I want to beat him, because he's one of the best players in the world.
"I have played well against him in the past, but he likes these conditions. He plays well in New York. He's made his only slam final here. He beat Novak here.
"He's obviously, I think, playing pretty well this summer. He played some good stuff at the Olympics and won the bronze.
"Grigor played his best but I didn't really give him a chance to get into the match. That's the beauty of an individual sport. Just because you play badly a couple of days ago doesn't mean I'm going to play badly tonight.
"My best tennis is in there. Not every day do you play your best. When you don't play your best and win, it's a really positive thing.
"A lot of people worry about that or panic, but you played one bad match. I won. I'm still in the tournament. I was able to play great tennis against Grigor."
