Barcelona's 4-3 El Clasico win was overshadowed by controversial refereeing decisions, particularly the disallowed goal by Fermin Lopez.

The point gap between first and second place in La Liga's is just small enough to entertain the idea of Real Madrid getting the better of Barcelona on Sunday, a result that would send both teams into a frantic race to the finish line.

Barcelona and Real Madrid are involved in another monumental clash, one that may well determine this season's La Liga winner on Sunday at at Lluis Companys Olympic Stadium.