It's a fault if the ball hits your body or clothes

If the ball hits a player's body, it is a fault for the team of the player it hit (10.C.3). The rule says nothing about where the player was standing (10.C.3).

Things that cause a fault if hit

• Your body (arms, legs, torso, and so on) (10.C.3)
• Clothes, hats, shoes, and anything else you are wearing (10.C.3)
• Anything you hold in your hand other than the paddle (such as a spare ball) (10.C.3)

Things that do not cause a fault

• The paddle (10.C.3)
• The hand holding the paddle, from the wrist down (The hand holding the paddle counts as part of the paddle) (10.C.3)

Examples

• An opponent's smash hits you in the chest → fault for you (10.C.3)
• A ball that looked like it was going out hits your leg before bouncing → fault for you (Even outside the court, getting hit by a ball in the air is a fault) (10.C.3)
• A ball your partner hit strikes you in the back → fault for your team (10.C.3)

On the serve

• The serve hits the server or the server's partner → fault for the server (7.E.4)
• The serve hits a player on the receiving team before it lands → fault for the receiving team (7.E.5)