Watch as Chelsea striker Diego Costa refuses to sign a shirt with Oscar’s name on the back, opting instead to autograph one of the fan’s trainers during a signing session at an Adidas store.

The fan in question is a presenter for a YouTube channel by the name of CheekySport, so we shouldn’t rule out a spot of impudence on his part.

Costa, who is currently serving a three-match suspension for misdemeanors in the recent 2-0 win over Arsenal, handles the situation with a sense of humour not evident from his snarling on-pitch persona.