2) Radamel Falcao (Manchester United)
Manchester United’s latest addition Radamel Falcao is no doubt an expensive signing considering he is only joining a season-long loan, but still one that could have been well worth it for Arsenal. The Colombian international has been one of the best strikers in the world for the last few years, showing prolific form at Atletico Madrid before making the big-money move to AS Monaco last summer. Although United have paid around £6m to take him for the 2014/15 campaign, a player of his quality could prove to be the difference between winning a trophy and not.
SEE ALSO: Manchester United XI with Radamel Falcao.