Radamel Falcao - Van Gaal sacrificed Danny Welbeck to make room for El Tigre on deadline day in 2014 but his United career was a huge disappointment.
Signed on a season-long loan from Monaco, Falcao managed just four goals in 29 appearances for the Reds. He was even worse the following season at Chelsea, scoring once.
Found form at Monaco before moving to Galatasaray last summer. Daley Blind - The ultimate utility player, United fans were excited about Blind's arrival after his contribution to that Robin van Persie goal against Spain in the Brazil World Cup.
The 28-year-old was arguably United's best defender on a technical level but his lack of physicality and pace perhaps counted against him.
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