The summer transfer window will often make or break a team's season before it has even begun. Failure to improve your squad can have a devastating impact and once the market closes on Sept. 2 there is no going back.
With Europe's top leagues kicking off in August, the majority of business is usually conducted in June and July. If you wait too long, you risk missing out on your primary targets and being left on the shelf. However, some transfer directors, such as AC Milan's Adriano Galliani, will often play the waiting game in the hope of picking up a last-minute bargain to transform their squads.
There is still over a month to go for clubs to enhance their rosters, but who have been the winners and losers of the window so far? Below we take a look.