The Chelsea striker proved he can be just as aggressive off the pitch as he can be on it as he dished out a heavy-handed punishment to a friend after beating him on the video game. EXTRA TIME You do not want to lose to Diego Costa at FIFA 17 under any circumstances! Chelsea signs massive Nike deal The Chelsea striker, who has built up a bad boy reputation for his antics on the pitch, delivered his own unique form of punishment for one unfortunate friend. Check out the video below as Costa repeatedly slaps his friend across the arm as a punishment for losing to the Spain international. Absolutely brutal!