Chelsea striker Alvaro Morata was caught on camera making an obscene gesture towards Barcelona fans after they taunted him at the Nou Camp on Wednesday night.
The Spaniard was left on the bench for the Champions League last-16 tie second leg by Antonio Conte but was brought on with around 25 minutes to play.
Morata was then goaded by the Barca fans as a result of his Real Madrid background and hit back at the chants by shaking his genitals in their direction while waiting for a corner to be taken.