Radamel Falcao left for France in the summer of 2013. VALERY HACHE/AFP/Getty Images

Radamel Falcao insists that he knew he would not be staying at Atletico Madrid long "due to economic problems the club was experiencing."

Falcao, currently on loan at Manchester United from AS Monaco, scored 70 goals during his time in Spain before leaving Madrid for Monaco in the summer of 2013.

Having moved from River Plate to Porto for just four million euros in 2009, Falcao was sold for 40 million euros to Atletico in 2011 before being sold on again two years later for 60 million euros to the lucrative French club.