PAMPLONA – Sixteen-year-old Ansu Fati became Barcelona's youngest ever La Liga goalscorer on Saturday but could not prevent his side stumbling to a surprise 2-2 draw at promoted Osasuna which left the champions with only four points after three games.
Roberto Torres' thumping volley gave Osasuna the lead in the seventh minute to send the boisterous El Sadar crowd into a frenzy and Barca struggled to cope with the home side in a first half in which they failed to have a single shot at goal.
Barca were still without all-time top scorer Lionel Messi and fellow forwards Luis Suarez and Ousmane Dembele due to injury and coach Ernesto Valverde was left with little choice but to turn to Fati at the start of the second period.
The teenager had become Barca's second-youngest ever player in last week's 5-2 win at Real Betis and he needed only six minutes to get off the mark, rising to head home a cross from fellow academy graduate Carles Perez.
Perez also provided the pass which led to Arthur Melo giving Barca the lead in the 64th minute by brushing off two defenders inside the area before delivering a superb strike into the bottom corner.