Nottingham Forest vs Sheffield United referee, match officials, rules on VAR, away goals & subs

All eyes are on the City Ground tonight (Tuesday) as Nottingham Forest bid to get to Wembley in their quest to win promotion to the Premier League.

Forest take on Sheffield United in the second leg of their Championship play-off semi-final (7.45pm kick-off). Steve Cooper's side lead 2-1 from Saturday's first leg against the Blades at Bramall Lane.

Jack Colback and Brennan Johnson struck in Yorkshire to give the Reds a two-goal advantage. But Sander Berge's late reply has kept Paul Heckingbottom's men very much still in the tie.

The eventual winners will face Huddersfield Town in the final for a coveted place in the top flight, after the Terriers saw off Luton Town 2-1 on aggregate. Fulham and Bournemouth have already been promoted via the automatic route.

There could be some big decisions to be made during this evening's second leg in Nottingham - and the man in the middle will be Premier League Michael Oliver. On Saturday, he produced two reds cards as Brentford won 3-2 at Everton.

Oliver will be assisted by Stuart Burt and Dan Cook on the lines. Graham Scott will be the fourth official, with Natalie Aspinall on standby as the reserve assistant referee.

There will be no (video assistant referee) in operation at the City Ground, as was the case in the first leg and the other semi-final tie. However, the EFL has confirmed that VAR will be used in the play-off final at Wembley on Sunday, May 29.

Another key thing to consider going into tonight's game is that there is no rule (whereby away goals are deemed more valuable in the event of an aggregate draw). As a result, if the teams are level on aggregate after 90 minutes, 30 minutes of extra time will be played. And if the sides still cannot be separated after 120