Chelsea vs Tottenham Hotspur

The referee saw that Chelsea's number 9 had committed a foul and gave him a yellow card, but this was too lenient. The video shows Chelsea's player deliberately striking his opponent in the face with his elbow during a running contest, away from any genuine attempt to play the ball. Under football rules, an elbow strike to the head like this is violent conduct and demands a red card, not a yellow card. The referee correctly identified the foul but punished it at the wrong level.