Roger Federer, who lost to Novak Djokovic in the U.S. Open final, expects the 28-year-old Serb to build upon his total of 10 Grand Slam singles titles.

"Clearly he can win many of them," said Federer after their match at Flushing Meadows. "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."

Federer used the SABR (Sneak Attack By Roger) service return against Djokovic a number of times in the final and says he will continue to use the tactic. When his opponent tosses a second serve, Federer charges the net and takes the ball early off the bounce. Federer has using the SABR since Cincinnati, where he won the title. He was particularly successful with it against Stan Wawrinka in the semifinals of the U.S. Open.

"I think it worked very well, and I'm sure I will use it more in the future against [Djokovic] and many others," Federer said. "It was a really interesting last few months or so looking at that tactic. If you look at the points you probably have to win, you have to play them perfectly. So could have won even more so. Who knows? Maybe I should have played even more of it. I did get many more looks on the second serve as the match went on."