Here are all of the key stats and facts you need to know ahead of the first leg...

Nottingham Forest v Manchester United

Manchester United have won all three of their Carabao Cup meetings with Nottingham Forest – 4-0 in 1982-83 (quarter-final), 1-0 in 1991-92 (final) and 2-1 in 1998-99 (fourth round).
Nottingham Forest have lost their last seven meetings with Man Utd in all competitions – they've never lost eight in a row against an opponent before. This is their first home game against the Red Devils since an 8-1 defeat in February 1999.
Nottingham Forest have progressed from all six of their Carabao Cup semi-final ties, with this their first appearance in the last four since 1991-92. It's the best 100% progression rate in the competition's history.
This will be Manchester United's 17^th appearance in the Carabao Cup semi-finals, with only Liverpool appearing in more (18). They could become the second side to reach the final of the competition on 10 occasions, along with Liverpool (13).
Nottingham Forest have lost just one of their last 10 home Carabao Cup games (W7 D2), going down 4-0 against Wolves in the second round last season.
Manchester United have won their last five away Carabao Cup games, keeping a clean sheet in each of the last four. It's their longest run of away wins in the competition's history.
Nottingham Forest are the highest scorers in this season's Carabao Cup so far (10 goals), while no side has had more different goalscorers than Forest in the competition this term (7).
Marcus Rashford has scored nine goals in his last 10 Carabao Cup games, including four in three appearances this season. The last Manchester United player to score 5+ goals in a single Carabao Cup campaign was Carlos Tévez in 2008-09 (6).

Carabao Cup Semi-Final: First leg stat pack

Carabao Cup Semi-Final: First leg stat pack