Despite numerous successes and incredible feats in the world of tennis, Roger Federer, Novak Djokovic and Rafael Nadal have no intention of stopping. The Swiss champion is looking forward to returning to play after continuing knee problems and, in an interview with Srf Sport, said: “I am rebuilding everything, I can now slowly think about my return.A few weeks ago I had an MRI scan, which was very positive. This gives me hope and makes me feel safe. It will definitely take some time. I could come back in late summer or early autumn ” Djokovic, excluding the sad Australian interlude, has lost only one game in the last four Grand Slam tournaments.His only defeat, the one against Daniil Medvedev at the US Open, prevented him from achieving the Grand Slam dream. Nadal, on the other hand, returned …