Ansu Fati became the third youngest player to score in La Liga on Saturday but the 16-year-old could not rescue Barcelona from being held to a 2-2 draw away at newly-promoted Osasuna.
Fati equalised five minutes after coming on at half-time and Barca looked likely to complete the comeback when Arthur Melo, also on a substitute, made it two 13 minutes later at El Sadar Stadium.
Yet Roberto Torres, who had given Osasuna an early lead, delivered a twist by scoring a late second from the penalty spot after Gerard Pique handballed.
Hear from Barcelona boss Ernesto Valverde in the clip above
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