New rules to be tried at the NextGen ATP 21-and-under finals in November this year in Milan:
- Shorter Format: First to Four games sets (Tie-Break at 3-All), Best-of-Five sets, with No-Ad scoring:
• Shorter set format designed to increase number of pivotal moments in a match, while the best-of-five set format does not alter the number of games required to win a match (12) from the traditional scoring format. No-Ad scoring will be played (receiver’s choice).
- Shorter Warm-Up
• Matches will begin precisely 5 minutes from the second player walk-on, leading to a reduction in down time before the beginning of matches.
- Shot Clock
• A shot clock will be used in between points to ensure strict regulation of the 25-second rule, as well as during set breaks, Medical Time-Outs, and the five-minute countdown from the player walk-on to the first point of the match.
- No-Let Rule
• The No-Let rule will apply to serves, bringing in an additional element of unpredictability at the start of points. This rule will also remove any ambiguity over let calling from umpires, ensuring the rule is consistent with normal ‘let’ occurrences during regular point exchanges.
- Medical Time-Outs
• A limit of 1 medical time out per player per match.
- Player Coaching
• Players and coaches will be able to communicate at certain points in the match (to be determined), providing additional content and entertainment value for broadcast. Coaches will not be allowed on-court.
http://www.atpworldtour.com/en/news/...tp-finals-2017