MADRID : Barcelona have the chance to land an almost fatal blow to Real Madrid's LaLiga title aspirations in a mouthwatering 'El Clasico' on Sunday and edge closer to reclaiming the title. Barca are top by four points over Real with four matches left and a win on Sunday would leave them needing one more victory to clinch a 28th Spanish league title while leaving last year's champions licking their wounds in a trophyless season. Unbeaten domestically since late December playing some of the most