That result meant they have won 13 out of 14 matches so far this season, the best ever start by anyone to a league game.
Barcelona are now six points clear of Atletico Madrid and 11 from champions Real Madrid.
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Who of Europe’s top strikers will move to England this summer?
After a dreadful start to their Bundesliga campaign, Borussia Dortmund appear to have weathered the storm after going five matches without defeat.