#5 Manchester United: €1.10bn
Since the great Sir Alex Ferguson left, United have switched focus from developing academy players to spending big in the transfer market. Jose Mourinho has signed a host of stars in the past year, with Alexis Sanchez, Romelu Lukaku and Fred to name a few. Similar to Liverpool, the pressure is on for United to win trophies to merit the huge investments.
#4 Paris Saint-Germain: €1.24bn
PSG's recent signing's of Neymar (€222m) and Kylian Mbappe (€180m) are the two most expensive transfers of all time, and have sent shock-waves throughout the world's transfer markets. More silly money transfers can be expected from the French champions in the coming years as they seek the Champions League title.