Barcelona avenged their first leg Copa del Rey defeat to Sevilla earlier in the month with a 2-0 win on Saturday in La Liga.
The two sides will meet again on Wednesday for the Cup's second leg -- with Barcelona losing 2-0 on aggregate -- but the points were all the Catalan's side on Saturday thanks to Ousmane Dembele and Lionel Messi.
The win puts Barcelona into second position but a win for Real Madrid on Monday would see them leapfrog Ronald Koeman's side.