Most fans view a transfer window through the prism of potential incomings. They speculate about which additions could take their side to the next level.
But there are others - often supporting clubs who harbour a talismanic figure - who live in dread, counting down the hours until the window slams shut with their prized asset still in the building.
Only for the charade to start again a few short months later.
Here's Mail Sport's round up of the latest news on outgoings for each club in our transfer special.
Arsenal
Arsenal are coming off a surprise title fight in a position of strength and are flexing their financial muscle with big money additions.