By Amanda Langell Real Madrid and Barcelona have won the most UEFA Super Cups in history, but Los Blancos can break the tie with a victory over Atalanta on Wednesday, Aug. 14. The UEFA Super Cup is an annual match that features the reigning Champions League and Europa League champions. The two clubs that won the two biggest competitions in Europe face off for the chance to earn a trophy before their domestic leagues kick off. Unsurprisingly, Real Madrid have competed in their fair share of UEFA Super Cups. After all, Los Blancos are 15-time Champions League winners, with six of their wins comi…