https://apnews.com/bb397d8a0046437aa4b8d7329aa3868e

Video review for certain judgment calls, such as whether a ball bounces twice, will be available for the first time in men's professional tennis at the Next Gen ATP Finals for top 21-and-under players.

The tour announced Friday that players at the Nov. 6-10 event in Milan can request that chair umpires watch replays to decide whether rulings should be upheld or overruled. There will be no limit to these sorts of challenges, unlike the three available per set for electronic line-calling replays used currently at many tournaments.