Paris - German Alexander Zverev rose one spot to a career high seventh in the ATP Tour rankings released on Monday following his victory at last week's Rogers Cup in Montreal.
The 20-year-old stunned Swiss great Roger Federer 6-3, 6-4 in Sunday's final to win his second Masters 1000 title of the year, having beaten Novak Djokovic in the Rome title clash in May.
The biggest mover, though, was 18-year-old Canadian Denis Shapovalov, who climbed 76 places to 67th after reaching the semi-finals in Montreal, beating world number two Rafael Nadal along the way.
Briton Andy Murray retained the No 1 spot, but will lose it to either Spain's Nadal or Federer at the end of the week.
Murray is injured and will sit out the Cincinnati Masters, where he reached the final last year.
Top 20 in the latest ATP Tour rankings:
1. Andy Murray (GBR) 7 750
2. Rafael Nadal (ESP) 7 555
3. Roger Federer (SUI) 7 145
4. Stan Wawrinka (SUI) 5 780
5. Novak Djokovic (SRB) 5 325
6. Marin Cilic (CRO) 5 155
7. Alexander Zverev (GER) 4 470
8. Dominic Thiem (AUT) 4 030
9. Kei Nishikori (JPN) 3 285
10. Milos Raonic (CAN) 3 230
11. Grigor Dimitrov (BUL) 3 070
12. Jo-Wilfried Tsonga (FRA) 2 770
13. David Goffin (BEL) 2 560
14. Roberto Bautista Agut (ESP) 2 425
15. Tomas Berdych (CZE) 2 390
16. Jack Sock (USA) 2 335
17. Pablo Carreno Busta (ESP) 2 305
18. Lucas Pouille (FRA) 2 220
19. John Isner (USA) 2 110
20. Sam Querrey (USA) 2 060
Selected others:
27. Kevin Anderson (RSA) 1 440
67. Denis Shapovalov (CAN) 721