Roger Federer admits earning the year-end world number one ranking is no longer a realistic ambition despite his remarkable renaissance this year. It worked to perfection this year and he said: "Look, it's not a realistic goal in some ways, the world number one. "Maybe if I start thinking about it too often and too much, I think I'm maybe also not playing the way I'm supposed to be playing. Maybe I tense up, maybe I'm nervous, maybe that's not good for my back. "So I'm just happy I'm playing a great season.

Source: dna November 17, 2017 05:03 UTC