Top 10 most profitable transfers of all time

Honourable Mention

Kylian Mbappe - AS Monaco to Paris Saint-Germain

Paris Saint Germain Unveil New Signing Kylian Mbappe

Financial Fair Play has been decried as a bit of a farce by plenty of top managers, and this transfer is perhaps most emblematic of all things deficient with UEFA's regulations. PSG spent big in the summer, and had they purchased Kylian Mbape as well, they would have run afoul of FFP.

Thus, AS Monaco agreed a deal that would see Mbappe loaned out for the 2017/18 season, with PSG obligated to buy the Frenchman for a staggering €180 million next year, thus complying with FFP regulations.

Monaco are a club that does incredibly well when it comes to the 'buy low - sell high' model, but this transfer surely takes the cake, since Mbappe came through their own academy. Once the deal is confirmed next season, this will be the most profitable transfer of all time.

Fee Paid: €0m

Fee Sold: €180m*

Profit: €180m*

*Transfer to be finalized next year.