Manchester United lifted the FA Cup on Saturday against Manchester City, as Alejandro Garnacho and Kobbie Mainoo make history. It was the greatest moment Manchester United fans will have seen in a decade. To defeat the cross-city rivals at Wembley and lift the FA Cup is truly special. The special moment came courtesy of a perfect game plan from Erik ten Hag and goals from his two spectacular wonderkids. Kobbie Mainoo and Alejandro Garnacho scored the two goals for United and left City speechless. In doing so, the pair made history and broke a few records too. Here’s what happened when United’s…