Novak Djokovic, who has won all three majors this year, had retained his spot at the top of the new ATP rankings released on Monday.
The Serb, who has his eyes set on winning the US Open, has now spent a record 333 weeks in top spot, well ahead of next-best Roger Federer, who managed 310 and is now down at number nine.
Rafael Nadal slipped out of the top three in the new ATP.
While Jannik Sinner, who won the Washington tournament at the weekend, jumped nine places to 15.
The 20-time Grand Slam winner Nadal lost to Lloyd Harris in the round of 16 in Washington to find himself dropping one place to number four with the Greek Stefanos Tsitsipas replacing him at three.
ATP rankings as of August 9:
1. Novak Djokovic (SRB) 12,113 pts
2. Daniil Medvedev (RUS) 9,643
3. Stefanos Tsitsipas (GRE) 8,115 (+1)
4. Rafael Nadal (ESP) 7,315 (-1)
5. Alexander Zverev (GER) 7,183
6. Dominic Thiem (AUT) 6,915
7. Andrey Rublev (RUS) 6,005
8. Matteo Berrettini (ITA) 5,533
9. Roger Federer (SUI) 4,215
10. Denis Shapovalov (CAN) 3,625
11. Pablo Carreño (ESP) 3,260
12. Casper Ruud (NOR) 3,205
13. Hubert Hurkacz (POL) 3,118
14. Diego Schwartzman (ARG) 2,913
15. Jannik Sinner (ITA) 2,745 (+9)
16. Félix Auger-Aliassime (CAN) 2,693 (-1)
17. Alex De Minaur (AUS) 2,600 (+1)
18. Roberto Bautista (ESP) 2,585 (-2)
19. David Goffin (BEL) 2,513 (+1)
20. Christian Garín (CHI) 2,475 (-1)
This article was originally published on Nigeria News