Rules
Is the kitchen line in or out? How the lines count
All lines bounding the non-volley zone are part of the zone, but a serve that lands on the kitchen line is out. Here is how the rulebook treats each line.
All lines bounding the non-volley zone are part of the zone, but a serve that lands on the kitchen line is out. Here is how the rulebook treats each line.
You call "out" for lines on your own end, and doubtful balls are "in". Rule 8 of the 2026 rulebook covers certainty, timing and partner disagreements.