Mexican defender Rafael Marquez broke the deadlock three minutes past the hour mark.

He rose unmarked at the near post to head home Xavi’s corner from the left.

Cameroonian striker Samuel Eto’o ensured the victory in stoppage time when he fired a powerful bullet that left the keeper with no chance.

The league title remains in Barca sight as they lie second in the table with 37 points, four adrift of leaders Real.

Los Merengues can increase the gap if they beat Real Zaragoza later on Sunday.