Roger Federer expects injury lay-off to prolong playing career:…

Roger Federer believes his six-month absence due to a knee injury could help prolong his playing career, with the 17-times grand slam winner saying he has enjoyed the break. The 35-year-old Swiss had surgery on his left knee in February and, after missing the French Open with a back injury, announced in July that he needed extensive rehabilitation and would be sidelined for the rest of the season.