Novak Djokovic of Serbia retained a comfortable lead atop the unchanged top 10 of the men's tennis rankings. 
Djokovic remained on 16,950 points in the ATP rankings released Monday while Andy Murray is second with 8,915 points. 
Swiss Roger Federer inched a bit closer to Murray with 6,745 points in third while Spaniard Rafael Nadal dropped 70 points to 5,335 but remained fourth, dpa reported. 
The rest of the top 10 was unchanged in order and points with Switzerland's Stansislav Wawrinka fifth with 5,035 points. 
ATP top 10 as of June 13 (previous ranking in parenthesis): 1. (1) Novak Djokovic, Serbia, 16,950 points 2. (2) Andy Murray, Britain, 8,915 3. (3) Roger Federer, Switzerland, 6,745 4. (4) Rafael Nadal, Spain, 5,335 5 (5) Stanislas Wawrinka, Switzerland, 5,035 6. (6) Kei Nishikori, Japan, 4,290 7. (7) Dominic Thiem, Austria, 3,105 8. (8) Tomas Berdych, Czech Republic, 3,030 9. (9) Milos Raonic, Canada, 2,965 10.(10 Richard Gasquet, France, 2,905.

Source: QNA