Novak Djokovic is still winning at Wimbledon, but the victories are coming at a growing physical cost. After battling past Roman Safiullin to reach the quarter-finals, the 39-year-old Serbian once again confronted a reality even tennis' greatest champions can't escape: age.
The seven-time Wimbledon winner secured his 106th match win at the All England Club, moving ahead of Roger Federer on the men's all-time list. Yet the performance also highlighted the physical challenges now recurring in the later stages of his career.
