Novak Djokovic is going through a really delicate moment in the last part of his legendary career and his decision to end the collaboration with Andy Murray is considered as another alarming sign. The former world No.

The novelty and almost unprecedented nature of having two such recent former adversaries teaming up was always going to be a major sideshow

Djokovic, a 24-time Grand Slam champion, joined forces with Murray in November. Under Murray, the Serb reached the semi-finals of the Australian Open, ultimately retiring injured