Lionel Messi had put the match squarely in the Catalan giants favour as he scored a six-minute brace to put them two goals to the good in the first half.
However, following the break, Leganes came out all guns blazing and found their breakthrough in the 68th minute.
A beautiful side pass found El Zahr in tonnes of space and the forward had no trouble cutting his shot across the face of goal to beat Marc-Andre Ter Stegen and pull a goal back for the visitors.
Check out the goal for yourself:
April 7, 2018