After his loss to Novak Djokovic in the US Open final on Sunday night, Roger Federer did not have any hesitation when it came to giving props to Novak Djokovic’s game.

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He was asked how he felt Djokovic was playing right now and how many majors he might win. Here is Federer’s response:

“I think he's playing very well,” Federer said. “Are you kidding me? I think he's doing really well. He's having a wonderful season, like in 2011. He's just really consistent. Seems like there are not many guys that can hang with him, don't have the tools or dare to go forward, or they aren't daring to serve and volley against him because he's so good on the return. Which he is. He's perfected his game on the hard courts, no doubt about it.”

Federer, who showed some brilliant tennis himself on Sunday despite the 6-4, 5-7, 6-4, 6-4 loss, says that Djokovic has many more Grand Slam titles in him.

“To say the least, it's very impressive,” he said. “He's having unbelievable career. You know, I think everybody knows that he knows that, as well. Tonight is another example of that. Clearly he can win many of them. He already has a ton, so obviously he's got to stay healthy and all that stuff and hungry, but obviously you would think he will win more after tonight.”