The ginger cat ventured onto the playing area during the second half, with referee Michael Oliver halting the game until it had gone.
Lose Neymar to PSG, lose Ousmane Dembele to injury, wait until January for Philippe Coutinho and yet, Barca are on course for a treble. It's magic.
Yes, it was a stinking defeat to Sevilla. But Jose Mourinho should not be sacked -- Manchester United need stability, and he deserves another season.
A crucial summer beckons for Chelsea and the next few weeks will determine whether they'll build from a position of strength or weakness.
Fan footage from the Nou Camp reveals an incident between Chelsea fans and Barcelona stewards.
Busquets, 29, had to go off in the second half against Chelsea and was replaced by Andre Gomes as Barca won 3-0.