Barcelona defender Joao Cancelo says matchwinner Marc Guiu owes the squad dinner.

Guiu struck the winner against Athletic Bilbao 33 seconds into his debut on Sunday.

Barca won 1-0, with Guiu's scoring the only goal of the night.

Afterwards, Cancelo reminded the 17 year-old he owes the team a dinner for his contribution.

"You have to pay for dinner. You have to pay for a dinner at McDonald's," said the full-back to the 17-year-old youngster at the final whistle.