World number two Roger Federer still believes that he can win another major and add to his tally of 17 Grand Slam titles despite age factor remaining as a big concern, according to ATP World Tour commentator Robbie Koenig.
The former South African tennis player said that the Swiss maestro still believes he could win it, 100 percent, adding that when one has done as much as he had done, then one still believe, Sport24 reported.
Reflecting on the age factor, Koenig said that when one get over 30, one get off days and on those off days one lose, which is not always the case when one is in his prime.
At present, Federer leads the Grand Slam tally with 17 while Spaniard Rafael Nadal is tied with Pete Sampras at 14.