It was the first goal of the bissauguinean in La Liga. He made his league debut for Barcelona last weekend and became the club's youngest player of 78 years.
However, Fati's historic goal was not enough for the reigning champion, who had to settle for 2–2 when Osasuna's Roberto Torres acknowledged with nine minutes remaining - the midfielder's second goal of the day.
It was Barça's first cruise of the season after a win and a loss.