An umpire assesses whether a player’s behavior—such as racket abuse, ball abuse, or audible obscenities—warrants a warning or a penalty point. In one instance, Andy Murray was not penalized for kicking a ball that narrowly missed an umpire because the umpire decided not to enforce must still judge when a player is taking an unreasonable amount of time between points or changeovers. They must strike a balance between enforcing the rules and considering the specific circumstances of the match, such as a long, drainThe umpire or referee can suspend a match due to weather, darkness, or adverse court conditions. The decision of when to suspend and resume play is at their discretion.

If a player is hindered by an action (either deliberate or unintentional), the umpire decides if the hindrance was intentional and whether the point should be replayed or awarded to the hindered player.