Derby County travel to Doncaster Rovers tonight, and if they win, they will be guaranteed a place in the play-offs, regardless of other results. A win would also keep alive any hopes of automatic promotion.
If they slip up though, and Burnley win against Blackpool, they will be promoted in second place, and the most Derby can hope for is third.
Of course, Leicester are already promoted, but they could do Derby a favour by beating Queen's Park Rangers tomorrow.
Nottingham Forest take on Birmingham City tomorrow too, and they'll be looking to get a first win since 11 February. Birmingham are just three points above the drop zone, and win will ease some of the pressure on Lee Clarke.
Wolves are already promoted, but will take a step towards the league title with a win against Rotherham.
Most of the play-off places are secured already, but Peterborough United can clinch the final spot if they beat Bradford City away, providing Swindon Town lose, and both Sheffield United and MK Dons fail to win.
At the bottom, Shrewsbury Town and Notts County will be desperate for a win, with both sides deep in relegation trouble. But the league is very tight, and neither side's fate can be confirmed today.
Chesterfield will take a giant step towards promotion with a win at Exeter City. They are already five points clear of fourth placed Fleetwood Town.
Burton Albion will be hoping Chesterfield slip up however, as they are six points behind them in fifth. A win against Hartlepool United on Saturday could all but confirm a play-off spot.
Mansfield Town will still be in with a play-off chance if they beat Accrington Stanley.
Northampton Town are still in trouble, as they sit in the second play-off spot. But they take on Wycombe Wanderers, who sit a place above them, and are level on points. A win would give them a massive boost towards safety with just 3 games to after today.