Roger Federer has said that he will train hard to come back strong after he was knocked out of the Madrid Open by Kei Nishikori.

“I'm going to go back to the practice court, train hard, and make sure I don't have these kinds of days anymore,” he said to

“I was lacking control from the baseline, and that pretty much carried through from start to finish. 

“I'm pretty disappointed with my play. I'm not sure how well Kei thought he played. I didn't think he had to play his very best either, which is even more disappointing."

Federer lost the World Number 14 in three sets and will now be overtaken by British star Andy Murray as the World Number two but the Swiss maestro insists he is still a threat to be reckoned with.

The 17 time Grand Slam winner further added: “At least I'll come out with some ideas of what I need to work on. 

“Clearly the ball flies here and it's faster, so that makes it sometimes trickier to find your rhythm. We're so accustomed to always finding that rhythm eventually, so it's even more disappointing if you never really find it, which was the case today."

Despite stating that he was not on his best game, Federer gave full credit to his young opponent, and acknowledged that the Japanese star was solid and played better tennis. 

The 31-year-old also indicated that he had gained motivation from his defeat and wanted to be back at training as soon as possible so that he may be able to work on his flaws.

He also appreciated the rising stars who have been giving a tough time to the big players lately.

"I think it's exciting and good for the game that not-so-well-known and younger guys are beating the top guys. It's good to see. It means they believe in it. I hope we'll see more of it in the future,” he said.

Federer has not been able to win a title so far this year but is hoping to gain his best form before the upcoming French open which starts later this month.

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