There was some movement lower down the rankings, with Japan's Hideki Matsuyama gaining four places to rise to 16th after finishing third in the Wyndham Championship.
World golf top 20
1. Jason Day (AUS) 14.17 average pts
2. Dustin Johnson (USA) 10.99
3. Jordan Spieth (USA) 10.11
4. Henrik Stenson (SWE) 9.34
5. Rory McIlroy (NIR) 8.94
6. Bubba Watson (USA) 6.65
7. Adam Scott (AUS) 6.38
8. Rickie Fowler (USA) 6.12
9. Justin Rose (ENG) 6.01
10. Danny Willett (ENG) 5.83
11. Sergio Garcia (ESP) 5.48 (+1)
12. Branden Grace (RSA) 5.39 (-1)
13. Phil Mickelson (USA) 5.19
14. Patrick Reed (USA) 4.85
15. Matt Kuchar (USA) 4.55
16. Hideki Matsuyama (JPN) 4.53 (+4)
17. Louis Oosthuizen (RSA) 4.43 (+1)
18. Brooks Koepka (USA) 4.39 (-2)
19. Jimmy Walker (USA) 4.36 (-2)
20. Russell Knox (SCO) 4.31 (-1)