Most Grand Slam Matches Played in a Single Season

The Open Era ceiling for Most Grand Slam Matches Played in a Single Season is 28, and it is shared: Jannik Sinner (2025), Roger Federer (2006), Roger Federer (2009), Novak Djokovic (2015), Novak Djokovic (2021), and Novak Djokovic (2023).

Context for the number: each Slam main draw requires 7 wins to take the title, so the theoretical maximum is 28 matches across the four majors (7+7+7+7). In practical terms, this is a full-season major endurance marker: one early exit immediately pulls the total down, and sustaining this level requires deep runs from Melbourne through New York.