They seemed to offend the referee.

The referee, according to principle of advantage, raised his hand and motioned for the advance to continue.

The coin toss decides who will kick off the match.

When the goalkeeper touched the ball, the referee awarded the other team a corner kick.

The assistant referee held up his flag to show the referee that the ball was still in play.

The referee blew his whistle twice to tell everyone it was full-time.