By Ewan Murray Real Madrid were due to take to the field on Saturday evening but their La Liga clash with Valencia has now been officially postponed. Los Blancos, who were handed a bruising 4-0 defeat by Barcelona in El Clasico last weekend, were scheduled to travel to the Mestalla for their 12th La Liga match of the season, but will now next be seen in the Champions League on Tuesday evening as they host Milan. But why has Madrid’s trip to eastern Spain been called off? Here is the latest on the situation. Why has Real Madrid’s match with Valencia been postponed?Madrid’s match against Valenci…