van Gaal's Unorthodox Approach Pays off in Manchester United FA Cup Win

Louis van Gaal has experimented often during his tenure as Manchester United manager so far, and he continued to do so during his team's FA Cup win over Cambridge United at Old Trafford on Tuesday night.
The formations doing the rounds once the starting XIs had been announced showed Marouane Fellaini in midfield and Wayne Rooney up front with Robin van Persie. When the teams lined up, though, United were playing a 4-4-2 diamond with Rooney in midfield and Fellaini lurking around the box.
The formation was extremely flexible. Ostensibly, it looked as if Daley Blind was playing at the base of the diamond with Juan Mata at the tip, Angel Di Maria on left and Rooney on the right. Continuing the "square pegs in round holes" motif, Patrick McNair played at right-back instead of his usual centre-back.