Goncalo Ramos also scored in the final minute of PSG's 4-0 win over Atalanta PHOTO: Getty Images
PSG were the deserved winners of last season's Champions League – as part of the treble – when they blew away Inter Milan 5-0 in the final.
Spanish champions Barca had been arguably the most exciting team to watch until their semi-final exit at Inter's hands.
So many eyes on Wednesday were on the Estadi Olimpic Lluis Companys, which remains Barcelona's temporary home until the Nou Camp is ready.
Impressively, PSG came away with all three points - despite injuries to their first-choice front three of Khvicha Kvaratskhelia, Ousmane Dembele and Desire Doue, plus captain Marquinhos - while they lost midfielder Joao Neves in the warm-up.
Barca started brightly, with Rashford and Lamine Yamal impressing on the flanks, and got the opening goal.
But former Barcelona boss Luis Enrique's visiting side showed their class with their lung-busting full-backs assisting both goals.
Mayulu, 19, struck his second Champions League goal - with his first coming in the final in Munich.
PSG had a host of late chances, with Lee Kang-in hitting the post before fellow substitute Ramos bagged the winner. (BBC)
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