Below are the rules and innovations used at the 2025 Next Gen ATP Finals presented by PIF.

SCORING:
- First-to-4, Best-of-5 set scoring: Each match shall be the best of 5 tie-break sets. Each set shall be first to 4 games with a margin of 2 games and a tie-break (first to 7 points with a margin of 2) played at 3-3. Each game shall be played using the No-Ad scoring format with the server choosing the service box.

CHANGEOVERS:
- There will be no change of ends after the first game.
- Players will change ends and sit down for 90 seconds after the first three games are played, once more if the set score reaches 3-2 (i.e., after two more games in the set), and then again at the end of the set (regardless of the final set score).
- Players will change ends after every six points in the tie-break.
- Players will sit down at the end of the set for 90 seconds, reduced from 120 seconds.

RULES INITIATIVES:
- Warm up: Players will warm up for 3 minutes on court.
- Ball change: After every 7 games.
- Serve Shot Clock: Up to 8 seconds will be permitted between first and second serve. A shot clock will display the time elapsed between the first and second serve.
- Time between Points: The time between points will be reduced from 25 seconds to 15 seconds if a point is below three shots (e.g., 2 shots = 15 seconds; 3 shots = 25 seconds).
- Free Fan Movement: Free movement will be allowed in the stadium for the first three games of the match. After the first three games, fans will be allowed to move freely except for limited areas behind the baseline in direct player view.
- Movement by a spectator(s) in the designated free movement areas shall not constitute a legitimate pause in the shot clock.
- Umpire Chair: Lower umpire chair to reduce the visual obstruction for fans in the arena.

INNOVATION INITIATIVES:
In-arena data analytics: more match statistics and analytics will be available to fans, players and coaches than ever before. The following data will be shown in the arena:
- Traditional tennis statistics including aces, serve percentages, break point performance
- Player performance based upon rally length
- Player Shot Quality broken down by Serve, Return, Forehand, Backhand and Movement.
- Match Insights data detailing which Player has been “In Attack” the most, who has won more points when attacking (“Conversion Score”) and who has won the most points when defending (“Steal Score”)

The data will also be available to the players’ coaches courtside via the ATP’s performance analytics platform, ATP Tennis IQ Powered by PIF, as well as the provision of video footage tagged with match data available post-match.