The Masters series along with the Grand Slam tournaments, the ATP Finals championship and the Olympic Games are considered the top-tier events of men's tennis, referred to by the ATP as the "Big Titles".
They have been played on three different surfaces: hard outdoors: Indian Wells, Miami, Canada, Cincinnati and Shanghai; hard indoors: Stockholm (1991–94), Stuttgart (1998–2001), Madrid (2002–08) and Paris; clay: Hamburg (1990–2008), Monte Carlo, Madrid and Rome; carpet indoors: Stockholm (1990), Stuttgart (1995–97) and Paris (1990–2006).
The achievement of winning all of the nine active ATP Masters tournaments over the course of a player's career.
^ Player won all current nine Masters series events and ATP's now defunct Hamburg (clay) and Madrid (hard indoor) Masters events played in his career.
To avoid double counting, they should be updated at the conclusion of a tournament or when the player's participation has ended.