Nottingham Forest and Sheffield United face off tonight for a place in the Championship play-off final.
The game at the City Ground is finely poised, with the home team holding a slender 2-1 advantage over the visitors after their game at Bramall Lane at the weekend.
Forest boss Steve Cooper will be looking to bank his second consecutive appearance at Wembley, having guided Swansea there last season, while Blades manager Paul Heckingbottom is out to get his side back in the Premier League.
A place in the final against Huddersfield Town is the prize for the winners, and with so much on the line it's good to know the full ruling on the away goals rule.
The EFL website states: "The winner of a semi-finals is decided by the tie's aggregate score after the two legs. If the aggregate score is level at the end of the 90 minutes of the second leg, then an additional 30 minutes of extra time is played to try to create a winning team. If the score at the end of extra time is still level then the tie is decided by penalty kicks. Away goals do not count in the play-off semi-final matches .
"The two winners from the semi-finals meet at a neutral venue in the final. The final must be decided on the day, so extra time and penalties may be carried out if the scores are level. The winner of the tie gains promotion to the league above the one they are currently in."
