The biggest night of the Premier League season is set for this Tuesday, as clubs scrabble to complete deals on transfer deadline day at the same time as a major round of top-flight matches.
Clubs as well-stocked as leaders Chelsea and those struggling as much as bottom-of-the-table Sunderland are still looking to recruit before the window slams shut.
So when do the deals need to be done by, why are there games on the same day and what happens if your star player gets a big offer mid-match? Here, Sportsmail answers all the questions ahead of deadline day.