How is wheelchair table tennis different?

When the receiver is in a wheelchair, a serve that is otherwise correct is a let if the ball:

• After bouncing on the receiver's court, returns in the direction of the net.
• Comes to rest on the receiver's court.
• In singles, leaves the receiver's court by either side line after bouncing.

In wheelchair play a player loses the point if they:

• Do not keep at least some contact between the back of the thigh and the seat or cushion when striking the ball.
• Touch the table with either hand before striking the ball.
• Let a footrest or foot touch the floor during play.

Doubles with a wheelchair player in the pair:

• After the serve and the return, either partner of that pair may play the ball.
• No part of a wheelchair, and no foot of a standing partner, may cross the imaginary extension of the table's centre line.

Also:

• The umpire may relax the service rules for a player whose disability prevents a correct serve.
• Table legs must be at least 40 cm in from the end line, and the playing space may be smaller.
• A bat may be strapped to the hand.

A seated player cannot reach a ball that dies short or slides off the side. The service lets take those serves away and leave the rest of the game unchanged.