Topics: La Liga, Real Sociedad, Barcelona, Robert Lewandowski
The former Bayern Munich striker has officially announced himself to the Barca faithful.

Robert Lewandowski registered his first official goal for Barcelona by hitting the opener in Sunday's clash with Real Sociedad. On the day of his 34th birthday, Rthe Polish striker needed just 46 seconds to register his first La Liga goal for the Catalans inside Reale Arena.

Following their disappointing 0-0 draw against Rayo Vallecano in their season opener, Barca had a very bright start in their trip to the Basque club and were duly rewarded in no time. La Masia graduate Alejandro Balde was the man to set up Lewandowski, with the former Bayern Munich striker losing the defenders of Real Sociedad around their penalty box and redirecting home the low cross from his side's full-back.

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Barcelona's lead was, however, relinquished after a mistake by Frenkie de Jong in midfield led to him conceding possession. Aleksander Isak subsequenty got hold of the ball and raced on to fire home the equaliser for the hosts just four minutes after the opening goal was scored.