Ousmane Dembele’s second-half strike gave Barcelona a 1-0 win over 10-man Real Sociedad in their Copa del Rey quarter-final on Wednesday.
Sociedad forward Brais Mendez was shown a straight red card in the 40th minute for a wild challenge on Sergio Busquets.
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Barcelona were the better side for most of the match at Camp Nou but only scored once thanks to a brilliant counter-attack by man-of-the-match Dembele in the 52nd minute.
The electric winger ran through the right channel after receiving a perfectly placed long pass from his France team mate Jules Kounde and lashed an unstoppable right-foot strike into the top corner.
In-form Real Sociedad had come to the match with nine consecutive wins in all competitions.
In the other quarter-finals, Sevilla play Osasuna later on Wednesday while Real Madrid face Atletico Madrid and Valencia meet Athletic Bilbao on Thursday.