SportRules.org
Tennis - Rally judgment

Line calls and hindrance, point by point.

Many tennis arguments start after the rally looks finished, but the real ruling usually turns on an earlier event: the ball may already have landed out, touched the correct line, bounced twice, or become unplayable because one player hindered the other. The first decisive event controls the point.

Quick ruling: decide whether the ball was still legally in play before judging the next shot. If the point should already have ended because the ball was out or a player was hindered, later contact does not revive it.
Decision path

How the call is made

  1. Judge the bounce first: if any part of the ball touches the relevant line, the ball is in.
  2. If the ball lands clearly outside the line, the point is dead at that moment even if the opponent swings at it afterwards.
  3. Check whether the ball bounced twice, was carried, was touched before crossing to the striker's side, or whether the net was touched during play.
  4. If there is noise, movement, or an intrusion from another ball or person, decide whether that amounted to hindrance or lets caused by outside interference.
  5. Award the point, replay it, or let the result stand based on whether the interference was deliberate, accidental, or external.
What changes it

Details fans miss most

  • The line belongs to the court: a shot that clips the line is good, even if most of the ball is outside it.
  • A call can end the rally before the return: if the ball was already out, the next clean winner does not matter.
  • Not every distraction awards the point: accidental hindrance can lead to a replay, while deliberate hindrance can cost the offender the point.
  • Outside interference is handled differently: a stray ball or someone walking behind the court often triggers a let rather than awarding the point to either player.
Common argument

"Play should continue because nobody stopped"

That is not how the rule works. If the ball was out, the rally was already over whether or not the players noticed instantly. The winner of the point is decided by the ball landing out, not by who hit the next shot.

Edge case

Accidental shout during a live rally

Officials ask whether the opponent was genuinely hindered in trying to play the ball. If yes, the treatment depends on the code in use and whether the hindrance was deliberate or accidental. Annoyance alone is not enough; there must be real interference with the play.

Edge case

Double bounce disputes

  • If the second bounce happens before the player reaches the ball, the point is already lost even if the player flicks it back afterwards.
  • If the player makes contact just before the second bounce, play continues unless another violation occurred first.
  • These calls can stay difficult even with technology because the timing can be too tight for the naked eye without replay support.
Effective ruleset

Version check

The worked rulings apply the 2026 ITF Rules of Tennis. The tournament's current regulations determine whether human line officials, electronic line calling, or a challenge system is used and what review procedure follows. For hindrance, record who or what caused it, whether it was deliberate, and the chair umpire's announced ruling before deciding the point or replay outcome.