ATP World Tour 500 series

The ATP World Tour 500 series (previously known as the Grand Prix Super Series, ATP International Series Gold and the Championship Series) is the third highest tier of men's tennis tournament after the four Grand Slam tournaments, and the ATP World Tour Masters 1000. Roger Federer and Rafael Nadal hold the record for most titles apiece, at 17, while Daniel Nestor holds the record for most doubles titles won with 19. Juan Martin del Potro, Boris Becker, and Stefan Edberg holds the record for most titles won in a calendar year with four.

ATP World Tour 500 series

The ATP World Tour 500 series (previously known as the Grand Prix Super Series, ATP International Series Gold and the Championship Series) is the third highest tier of men's tennis tournament after the four Grand Slam tournaments, and the ATP World Tour Masters 1000. Roger Federer and Rafael Nadal hold the record for most titles apiece, at 17, while Daniel Nestor holds the record for most doubles titles won with 19. Juan Martin del Potro, Boris Becker, and Stefan Edberg holds the record for most titles won in a calendar year with four.