Manchester United have seen many top players come to the club with big ambitions over the past decade, and not live up to expectations. Radamel Falcao did not stand a chance. Louis van Gaal signed Falcao on deadline day in summer 2014, pulling off a surprise move to land the forward on loan. In the years leading up to the deal, Falcao was the most feared centre-forward in world football, a more pure striker than Cristiano Ronaldo or Lionel Messi. Then a disastrous move to Monaco saw him suffer a torn ACL and subsequently miss the 2014 World Cup. The move to Manchester United was Falcao’s attem…