Romelu Lukaku has joined
Manchester United for £75m, Arsenal have snapped up France
forward Alexandre Lacazette for
a club-record £46.5m, while Everton have already topped the £100m mark for
money spent.
But how much are those stars on the move really worth? And what
fees will others linked with big-money transfers command?
The CIES Football Observatory has calculated the value of the
world's top players using variables such as performance, international status,
contract, age and position.
Test your transfer acumen with our quiz and find out who is
worth what this transfer window according to CIES.