In the Champions League tie between Manchester United and Real Madrid which finished last night, for roughly 145 minutes the two sides played at even strength, and United outscored Real 2-1. For roughly 35 minutes, Real were a man up, and outscored United 2-0. Real went through. The shape and flow of the game changed instantly after Nani’s controversial sending off. Whether or not his particular red card was justified, it seems to me that the whole idea of the red card itself is not, and it would make more sense if teams were able to replace a sent-off player, using one of their substitutions.