Rafael Nadal is back on top of the ATP rankings on Monday.Photo: Cati Cladera/EPA

PARIS – Spain's Rafael Nadal regained the top spot in the men's ATP rankings from old rival Roger Federer on Monday after the latter's surprise final loss on the grass in Halle.

Nadal had slipped down to number two despite his 11th French Open success after Federer, 36, took the Stuttgart Cup to bag the number one ranking for the sixth time in his career and bask in a record 310th week at the summit.

But his Halle loss to Borna Coric cost him not only a 99th career title but his pole position as Nadal moved back above him by 50 points as the countdown to Wimbledon nears its end.

Coric's win lifted him 13 places meanwhile to a career-high 21st.

Queen's Club champion Marin Cilic moved up a spot to fifth after his win over Novak Djokovic, who moves back into the top 20.

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The ATP rankings as of June 25 are:

1. Rafael Nadal (ESP) 8770 pts (+1)
2. Roger Federer (SUI) 8720 (-1)
3. Alexander Zverev (GER) 5755
4. Juan Martín Del Potro (ARG) 5080
5. Marin Cilic (CRO) 5060 (+1)
6. Grigor Dimitrov (BUL) 4780 (-1)
7. Dominic Thiem (AUT) 3835
8. Kevin Anderson (RSA) 3635
9. David Goffin (BEL) 3110
10. John Isner (USA) 3070
11. Diego Schwartzman (ARG) 2435
12. Pablo Carreno (ESP) 2145
13. Sam Querrey (USA) 2130
14. Roberto Bautista (ESP) 2120 (+2)
15. Jack Sock (USA) 2110 (-1)
16. Fabio Fognini (ITA) 2030 (-1)
17. Novak Djokovic (SRB) 1965 (+5)
18. Kyle Edmund (GBR) 1950 (-1)
19. Nick Kyrgios (AUS) 1855 (+2)
20. Lucas Pouille (FRA) 1835 (-2)

Agence France-Presse (AFP)