article_snippet: It was staggering that Louis van Gaal did not turn to Radamel Falcao as Manchester United were trailing 2-1 against Arsenal in the FA Cup quarter-final.
article_snippet: Radamel Falcao (second right) was an unused substitute during Manchester United defeat to Arsenal .
article_snippet: but Colombia forward Radamel Falcao was left unused .
highlights_snippet: Radamel Falcao did not leave the bench as Arsenal beat Manchester United .
  