Chase review

Chase Review in tennis is an electronic line calling examination utilizing Hawk-Eye technology which allows having an instant replay and viewing an electronic trajectory of the ball and the mark, as it had landed on the court. A player in tennis can challenge a call made by an umpire or a linesperson, if the player disagrees with the call, regardless of whether the ball was called “good”, meaning that the ball was “in” (landed inside the tennis court), or the ball was called “out”. By the means of challenge, the player requests a chase review to be done. Chase review, therefore, is serving to resolve and/or prevent disputes about correctness of the call made by an umpire or a linesperson.

Chase review technology was first introduced during US Open in 2006. Today central courts of all four Grand Slam tournaments are equipped with the technology of electronic shot review.

There are certain rules applicable to challenging procedure: for example, each player can only have 3 incorrect challenges per set.

References

US Open