Aritz Aduriz netted a spectacular overhead kick to condemn Barcelona to a 1-0 defeat on the opening night of the new La Liga season.
The 38-year-old forward, who will retire at the end of the season, had only been on the pitch for a minute when he met Ander Capa’s cross with an acrobatic volley to bag a sensational 89th-minute winner at San Mames.
Defending champions Barca were without star man Lionel Messi, who is recovering from a calf injury, and were dealt a further blow when Luis Suarez was forced off with an apparent calf issue of his own late in the first half.
Suarez had squandered Barca’s best chance of the match, hitting the left-hand post after receiving a misplaced backpass in the penalty area, but it was Bilbao who looked most likely to make the breakthrough for much of the opening period, with Inaki Williams looking especially dangerous.
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Bilbao sat deeper in the second half, inviting pressure from a Barca attack that had previously proved impotent.
However, Ernesto Valverde’s side, featuring debutants Antoine Griezmann and Frenkie De Jong, were unable to find a way through and Aduriz – an 88th-minute replacement for Williams – settled the encounter in sublime fashion.
The match appeared destined for a goalless draw, however, until Aduriz kicked off his farewell campaign with a stunning volley that will take some beating in LaLiga this season.
The result ends a decade-long run of the Catalan giants winning their opening game of the season.