Most padel in-and-out calls are decided by one sequence: where the ball first landed, what it touched next, and whether the receiving pair still had a legal chance to return it. The walls are part of padel, but they are not a shortcut around the requirement to land the ball in the opponent's court first.
A padel shot is in when it crosses the net and its first bounce lands inside the opponent's court. A ball that touches any part of a court line is treated as in for that area. After that legal bounce, the ball may rebound off glass, fence, or leave the playing area depending on the court setup and the next event in the rally.
A return must not hit the opponent's glass, metal fence, wall, net post outside the legal path, or another outside object before landing on the court. If it hits those surfaces first, the player who struck the ball loses the point, even if the ball later drops into the court.
Padel lines are part of the court area they mark. A ball that clips the sideline, baseline, service line, or central service line is not out just because most of the ball looks outside the line. For ordinary rally shots, the relevant question is whether any part of the first bounce touched the court or line.
Once the ball has bounced in the opponent's court, it can hit the glass or fence and remain live unless another rule ends the point. The receiving pair may play the ball before it bounces a second time. This is why a shot that looks out because it hits the back glass can be perfectly legal if the bounce came first.
The ball must be returned before it bounces twice on the same side. A rebound off glass or fence does not reset the count. If the ball bounces on the court, hits the glass, and then bounces on the floor again before a player returns it, the receiving pair loses the point.
After the ball bounces on your side, you may let it rebound off your own glass and then hit it back. You may also hit the ball into your own glass first as part of a return, provided it then crosses the net and lands legally in the opponent's court. You may not hit the ball directly into the opponent's wall first.
A smash or angled shot can bounce in and then leave the court. On a court where out-of-court play is not authorized, that normally ends the point because the defending pair cannot legally chase outside. On an authorized court with safe access, the point can continue if the defender reaches the ball and returns it before a second bounce or outside-object contact ends play.
A serve must first land in the correct diagonal service box, and a serve that touches a service line is good for that box. After a legal service-box bounce, the serve is a fault if it hits the metal fence before the second bounce. A serve that clips the net is replayed only if the rest of the serve would otherwise be legal.
If the ball touches a player, their clothing, or anything they carry other than the racket in a legal stroke, the point is normally lost by that player's pair. Treating a body touch as if it were glass or fence is a common casual-play mistake.
Officials track the sequence rather than the shape of the shot. They look for the first bounce, whether the ball touched a line, what surface it hit next, whether the court allows outside play, and whether the receiver played the ball before a second bounce. If the sequence cannot be confirmed in casual play, the fairest practical answer is usually to replay only when both sides genuinely agree the call was uncertain.