Below are the returning rules and innovations for the 2021 Intesa Sanpaolo Next Gen ATP Finals:

  • First-to-4, Best-of-5 Set Matches
  • No-Ad Scoring
  • Free Fan Movement
  • Live Electronic Line Calling
  • Shot Clock
  • Video Review
  • Towel Racks

In addition, new rules and enhancements for 2021 include:

  • Shorter Warmups: Down from 4 minutes to 1. Less down time, more action.
  • Courtside Coaching: Coaching opened up from the side-lines. No more headsets.
  • Net Cams: Your front-row seat, right at the heart of the action.
  • Limited Medical Time-Outs: One per player per match.
  • Timed Bathroom Breaks: Max 3 minutes (+ up to 2 for change of attire). Clock's ticking.