Several of the most expensive transfers in world football history took place over the course of this summer's transfer window with the likes of Mesut Ozil , Neymar , Gareth Bale  and Radamel Falcao  all leaving their former clubs for greener pastures.
The summer and winter transfer markets allow clubs to improve their squads by signing new players and saying goodbye to other players. Big money transfers dominate headlines these days, as was the case with Gareth Bale's move from Tottenham Hotspur to Real Madrid. The transfer dragged on all summer and into the start of the Premier League season, but the deal was eventually done, making him the most expensive transfer in the history of the game.
Watch the video below to see the ten most expensive transfers of all time - any surprises? Do you think some clubs overpaid for a certain player? Do you think some clubs got a deal?
10. Mesut Ozil - Real Madrid to Arsenal, £42.4m9. Zinedine Zidane - Juventus to Real Madrid, £46.2m8. Neymar Jr. - Santos to Barcelona, £48.6m7. Fernando Torres - Liverpool to Chelsea, £50m6. Radamel Falcao - Atletico Madrid to AS Monaco, £51m5. Edinson Cavani - Napoli to Paris St-Germain, £55.6m4. Kaka - AC Milan to Real Madrid, £56m3. Zlatan Ibrahmivoic - Inter Milan to Barcelona, £60m2. Cristiano Ronaldo - Manchester United to Real Madrid, £80m1. Gareth Bale - Tottenham Hotspur to Real Madrid, £86m