Paris - Daniil Medvedev cracked the top five in the ATP rankings for the first time in his career after claiming his maiden Masters 1000 crown.
The 23-year-old became the first Russian player in history to win a Masters title, beating David Goffin in the Cincinnati Open final on Sunday.
The Russian is now fifth in the rankings released on Monday and led by Novak Djokovic who he beat in Saturday's semi-finals in Ohio.
But it was Goffin who made the most notable jump in the top 20 advancing four places to 15th.
Meanwhile, Gael Monfils has maintained his title as France's top player going up two spots to 13th.
Kei Nishikori dropped two places and finds himself at seventh while Roberto Bautista Agut made his top 10 debut having reached the Cincinnati quarter-finals.
Juan Martin del Potro suffered setbacks as he dropped four places and out of the US Open after a devastating run of injuries. The Argentine refractured his knee cap during the Queen's Club Championship in June.
Top 20 in the latest ATP Tour rankings:
1. Novak Djokovic (SRB) 11,685
2. Rafael Nadal (ESP) 7,945
3. Roger Federer (SUI) 6,950
4. Dominic Thiem (AUT) 4,925
5. Daniil Medvedev (RUS) 4,195
6. Alexander Zverev (GER) 4,005
7. Kei Nishikori (JPN) 4,005
8. Stefanos Tsitsipas (GRE) 3,455
9. Karen Khachanov (RUS) 2,890
10. Roberto Bautista (ESP) 2,575
11. Fabio Fognini (ITA) 2,510
12. Borna Coric (CRO) 2,160
13. Gael Monfils (FRA) 2,140
14. John Isner (USA) 2,075
15. David Goffin (BEL) 2,055
16. Juan Martin Del Potro (ARG) 2,050
17. Kevin Anderson (RSA) 2,050
18. Nikoloz Basilashvili (GEO) 1,985
19. Felix Auger-Aliassime (CAN) 1,750
20. Guido Pella (ARG) 1,735
99. Lloyd Harris (RSA) 535