NBA approves coach's challenge on one-year trial

A coach's challenge has been used in the G-League the past two seasons and currently is being used in the NBA Summer League in Las Vegas.

Head coach Mike Budenholzer of the Milwaukee Bucks reacts during the NBA Eastern Conference Finals against the Toronto Raptors.

The NFL has a red flag to announce a request for a replay review, and now the NBA will have a twirling index finger for the 2019-20 season.

The NBA approved a coach's challenge for the upcoming season on a one-year trial basis. Teams get just one challenge per game, even if it is a successful challenge, although plays still will be reviewed without the need for a challenge in the final two minutes of regulation or overtime.

A coach's challenge has been used in the G-League the past two seasons and currently is being used in the NBA Summer League in Las Vegas.

A team must have a timeout in order to challenge a play with the coach requesting the challenge by putting a finger in the air and rotating it in a circle.

If a team requests a challenge without a timeout, a technical foul will be called, and the play will not be reviewed.

Plays that can be reviewed include personal fouls called on a team, basket interference, goaltending and a ball out of bounds.

The NBA has also upgraded its procedures to verify a 2- or 3-point basket in a timely fashion, as well as for a shot-clock violation. A courtside administrator will be on hand at every game to speed up communication with replay officials at NBA offices in Secaucus, N.J.