Nottingham Forest are set for their first domestic cup semi-final since 1992 as they face Manchester United in the Carabao Cup semi-finals.
The tie is set to be played over two matches, with the first leg taking place at the City Ground on Wednesday night (January 25), kick-off 8pm. The winner will play one of Newcastle United or Southampton at Wembley next month to win the country's first silverware of the season.
Forest have beaten Grimsby Town, Tottenham Hotspur, Blackburn Rovers and Wolves to get to this stage, with Manchester United having overcome Aston Villa, Burnley and Charlton Athletic. Ahead of the big night under the lights in a couple of days' time, here is a look at all the key rules you need to know.
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Is there VAR in the Carabao Cup?
For the first time in this season's competition, VAR will be in place - for both semi-finals. The decision was taken at the start of the season that it would not be in use until at least the last four, meaning it will be in operation here and in the final.
Is there extra time and penalties in the Carabao Cup?
Again unlike in the previous rounds, if the tie is all square (after two legs) then there WILL be extra-time. Up until now, matches went straight to penalties in the event of a draw but an extra 30 minutes will be played if the two sides cannot be separated. There is also no away goals rule.
How many substitutions can be made in the Carabao Cup?
Like in the Premier League, sides are able to use up to five substitutions across three windows during the 90 minutes. If a change is made at half-time, this would not count towards the maximum a club's three opportunities.
If a semi-final goes to extra time, each club participating in the match will be permitted an additional opportunity to make a substitution. Each club shall also be permitted to utilise up to two "concussion substitutes".
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