Novak Djokovic returned to number one spot in ATP rankings published Monday despite missing US tournaments last month because of his lack of a Covid vaccination.Carlos Alcaraz had taken the top ranking from Djokovic after victory in Indian Wells, but the Spaniard bowed out of the semi-finals of the Miami Open on Friday to allow the Serb back for a record 380th week as No.1.Djokovic has a 380-point lead over Alcaraz, with Greece’s Stefanos Tsitsipas in third, more than 1,000pts behind the leading duo.ATP rankings 1. Novak Djokovic (SRB) 7,160 pts (+1)2. Carlos Alcaraz (ESP) 6,780 (-1)3. Stefanos Tsitsipas (GRE) 5,7704. Daniil Medvedev 5,150 (+1)5. Casper Ruud (NOR) 5,005 (-1)6. Andrey Rublev 3,470 (+1)7. Felix Auger-Aliassime (CAN) 3,450 (-1)8. Holger Rune (DEN) 3,3709. Jannik Sinner (ITA) 3,345 (+2)10. Taylor Fritz (USA) 3,06511. Karen Khachanov 2,855 (+5)12. Hubert Hurkacz (POL) 2,750 (-3)13. Cameron Norrie (GBR) 2,735 (-1)14. Rafael Nadal (ESP) 2,715 (-1)15. Frances Tiafoe (USA) 2,665 (-1)16. Alexander Zverev (GER) 2,410 (-1)17. Pablo Carreno Busta (ESP) 2,18518. Tommy Paul (USA) 2,090 (+1)19. Alex de Minaur (AUS) 2,050 (-1)20. Borna Coric (CRO) 1,890