Ex-coach questions Djokovic's tenacity

BELGRADE - Novak Djokovic has lost the killer instinct that enabled him to rule men's tennis for a number of years, former coach Niki Pilic said on Saturday.

"Djokovic reached the Mount Everest of tennis last year after winning the French Open," Pilic, who guided the Serb as a junior at his Munich academy, told Bosnian daily Nezavisne.

"He had 16,950 points and that's a tally that will never be repeated again. But loss of form and missing tournaments made his advantage melt away."