Federer back to third after Zverev's Munich knockout

Former world number one Roger Federer has returned to third in the ATP rankings released Monday, replacing Alexander Zverev after the reigning champion was knocked out of the Munich Open at the quarter-finals stage.

Federer, who has won a record 20 Grand Slams, is making his return to clay at the Madrid Open this week after three years' absence.

Elsewhere Stefanos Tsitsipas takes ninth spot from American John Isner following the Greek's victory at the Estoril Open.

Novak Djokovic remains first ahead of Rafael Nadal to mark the Serb's 250th week as world number one, a record only bettered on four occasions in the past.

ATP rankings as of May 6
1. Novak Djokovic (SRB) 11160 pts
2. Rafael Nadal (ESP) 7765
3. Roger Federer (SUI) 5590 (+1)
4. Alexander Zverev (GER) 5565 (-1)
5. Dominic Thiem (AUT) 5085
6. Kevin Anderson (RSA) 4115
7. Kei Nishikori (JPN) 3780
8. Juan Martin Del Potro (ARG) 3225
9. Stefanos Tsitsipas (GRE) 3190 (+1)
10. John Isner (USA) 3085 (-1)
11. Marin Cilic (CRO) 2845
12. Fabio Fognini (ITA) 2840
13. Karen Khachanov (RUS) 2685
14. Daniil Medvedev (RUS) 2625
15. Borna Coric (CRO) 2525
16. Milos Raonic (CAN) 2050
17. Nikoloz Basilashvili (GEO) 1930
18. Gael Monfils (FRA) 1920
19. Marco Cecchinato (ITA) 1875