Novak Djokovic said beating Russia’s Daniil Medvedev in the round-robin stage of the ATP Finals on Friday was a tough physical battle that took a lot out of him. Djokovic stayed unbeaten in the Red Group as he overcame Medvedev 6-3 6-7(5) 7-6(2) in a gruelling clash at the Pala Alpitour in Turin to top the standings.
