There must be different psychological hints and ideas.

Wang Hao always rubs the ball with his hand before serving.

I guess he wanted to wipe the dust off the ball.

And Gao, he put the ball in his shorts pocket and rubbed it back and forth for cleaning.

Deng Yaping blew on her hands and racket before receiving the serve.

The typical procrastination is probably that Marin put the ball in his pocket first, then lifted his left shoulder to wipe the sweat on his head, then lifted his right shoulder to wipe the sweat, then took out his jersey and lifted his shorts.

If Marin receives the serve, in addition to the above actions, she will add the right hand to spin the racket and the left hand to wipe the table, and at the same time, her left toe will click a few times. Usually, her opponent will look at him in the opposite direction.

This is a habit that athletes have developed since childhood. In fact, sweating is unrealistic. Give it a try.

Wearing a red belt on your leg means good luck.