PARIS: Greek rising star Stefanos Tsitsipas reached a career-high ranking of sixth on Monday after his run to the Italian Open semi-finals last week.
The 20-year-old failed to repeat his Madrid last-four win over Rafael Nadal, as the 17-time Grand Slam champion went on to lift his ninth Rome title.
Nadal remains second in the rankings, a long way adrift of Novak Djokovic, with the pair facing a possible final clash at Roland Garros in three weeks' time.
The Spaniard beat Djokovic on Sunday in the Italian Open final.
Roger Federer's return to Paris will see the 2009 champion arrive as the third seed.
Argentinian Diego Schwartzman jumped four spots to break back into the top 20 on Monday after also reaching the semi-finals in Rome.
ATP top 20
1. Novak Djokovic (SRB) 12,355 pts
2. Rafael Nadal (ESP) 7,945
3. Roger Federer (SUI) 5,950
4. Dominic Thiem (AUT) 4,845
5. Alexander Zverev (GER) 4,155
6. Stefanos Tsitsipas (GRE) 4,080 (+1)
7. Kei Nishikori (JPN) 3,860 (-1)
8. Kevin Anderson (RSA) 3,745
9. Juan Martin del Potro (ARG) 3,235
10. John Isner (USA) 2,940 (+1)
11. Fabio Fognini (ITA) 2,830 (+1)
12. Karen Khachanov (RUS) 2,800 (+1)
13. Marin Cilic (CRO) 2,710 (-3)
14. Daniil Medvedev (RUS) 2,625
15. Borna Coric (CRO) 2,525
16. Gael Monfils (FRA) 1,965
17. Milos Raonic (CAN) 1,960
18. Nikoloz Basilashvili (GEO) 1,925
19. Marco Cecchinato (ITA) 1,840
20. Diego Schwartzman (ARG) 1,755 (+4)