Real Sociedad moved into second place in LaLiga Santander after beating Celta Vigo 1-0 at Balaidos on Sunday.
The hosts missed several clear-cut opportunities to open the scoring in the first 45 minutes but squandered them all.
Santi Mina was the main culprit, wasting two headed chances from close range, hitting the post with the first and putting the second over the bar.
Celta were forced to play the final 25 minutes with 10 men after Pape Cheikh picked up his second yellow card and was subsequently sent off.
With their man advantage, Real Sociedad started to turn the screw and found their winner in the 82nd minute when Martin Odegaard fed Alexander Isak, who guided his left-footed strike into the far side of Ruben Blanco's goal.
The victory takes Imanol's side into second in the LaLiga Santander table, level on points with leaders Barcelona but behind on goal difference.
Celta are left languishing in 18th and missed their chance to move out of the relegation zone if only temporarily.
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