The Spaniard Carlos Velasco Carballo will referee Tuesday’s first leg of the Champions League quarter final tie at Manchester United. The 43-year-old has refereed Bayern’s previous two Champions League quarter-final away games. Velasco Carballo officiated the Reds’ 2-0 victory at Olympique Marseille in the 2012 first leg encounter. And he also refereed the second leg decider at Juventus that saw Philipp Lahm and Co record another 2-0 win. FC Bayern made it the final on both occasions.