Stefan Edberg, the coach of Roger Federer, believes that the Swiss world number two still has it in him to win more grand slam titles.
Federer, 34, has lost twice to world number one Novak Djokovic in grand slam finals this year, losing at Wimbledon and in Sunday’s US Open final.
The Serb beat Federer in our sets 6-4, 5-7, 6-4, 6-4 in a match that lasted over three hours on Sunday.
Edberg feels that conditions played a big role in the match against Djokovic in New York City.
"The match was postponed due to rain. It was much cooler and the courts were slower," said Edberg.
"The match was all on luck as only two points separated them (Djokovic won 147 points, while Federer 145). The match was tied and if Federer had a little more luck things could turn out differently," said Edberg.
The Swede still believes that Federer has it in him to still achieve a lot in tennis before he ever decides to stop playing.
"Roger has played some of his best tennis in the past few years and will not give up.
"He works hard and will ultimately reap the benefits.
"If he continues to play at this same level, he surely will create more chances to win Grand Slams," Edberg said.