Novak Djokovic believes Andy Murray has been the best player on the ATP Tour in the last six months and has little doubt the new world number one can maintain his recent sparkling form.
Murray displaced Djokovic at the top of the rankings last weekend when Milos Raonic withdrew from a Paris Masters semi-final with the Briton, Djokovic having lost to Marin Cilic in the quarter-finals.
The three-time grand slam champion has won his last four tournaments following his US Open quarter-final loss to Kei Nishikori and Davis Cup defeat at the hands of Juan Martin del Potro.
Djokovic will attempt to prevent Murray from adding the ATP World Tour Finals crown to his list of honours next week and, speaking at a media conference in London, the Serbian said: "I have only words of praise for what he has achieved in the last year or so.
"Starting with the clay court season where he was very consistent, I think he had the best clay court season of his life, playing three finals of the three big events and winning one in Rome, winning of course every event he played on grass including grand slam and [then] Olympic Games, he has had an incredible run.
"He is a well-deserved number one at this point because he has been the best player of the last six months without a doubt.
"Looking at the qualities he possesses as a player but also his determination to the sport, which is very impressive, there is a good chance he can play at this level for some time."