and Paris Saint-Germain
meet in the Champions League
on Tuesday night.
There are plenty of issues to consider ahead of the game, such as PSG's line-up amid their ongoing injury crisis, how the two managers will compare and how they key men will get on.
Sportsmail has taken a look at the situation ahead of the all-important clash at Old Trafford.
HOW WILL THEY LINE-UP?
: De Gea, Young, Lindelof, Bailly, Shaw; Matic, Herrera, Pogba; Lingard, Rashford, Martial
There are slight doubts over Eric Bailly being included in the side — Phil Jones is the likely other option for Ole Gunnar Solskjaer. Expect Marcus Rashford to get the nod ahead of Romelu Lukaku on the back of his ongoing goalscoring form and the fact he was rested at Fulham.
: Buffon, Alves, Kimpembe, Silva, Bernat; Paredes, Marquinhos, Verratti; Di Maria, Mbappe, Draxler
Paris Saint-Germain are suffering from an injury crisis and will be without Neymar, Edinson Cavani and right-back Thomas Meunier for the game. Gianluigi Buffon should get the nod ahead of Alphonse Areola in net while Dani Alves might play at right-back — Thilo Kehrer is the other option.
KEY MEN - RASHFORD VS MBAPPE
The interesting battle is between the two hotshot strikers who could be two of the best in the world in the next few years. Kylian Mbappe will be played slightly out of position through the middle.
He has not scored in his last two games but has five in his last five. Rashford has three in five games. He was also handed the Premier League's player of the month award, showing his recent form.
Over the entire season, though, Rashford has far fewer goals. He has hit nine in the league, which speaks for the infrequent way he was used by Jose Mourinho.
Mbappe, on the other hand, has 18 goals across all competitions this campaign in fewer minutes. That might be evidence of the consistent way in which he has been used.
Which of the pair is more clinical on the night might go a long way to deciding the scope of the game — and the tie.
Ole Gunnar Solskjaer
- Has little European experience, although managed Molde in the Europa League in his most recent spell there. Also managed to reach the round of 32 with the Norwegian team in the 2015-16 campaign. Has never managed in the Champions League, although did have a big part to play in United's win in 1999 — which may be an understatement.
- Had limited success in the Champions League with Borussia Dortmund. Did manage to take them to the quarter-final stage of the competition in 2017, although the infamous pre-match bus bombing unsettled his side and they went out at the hands of Monaco. Also reached the Europa League quarter-final stage in 2016, going out to Liverpool.
RESULTS SO FAR
Young Boys (a) - 3-0 win
Valencia (h) - 0-0 draw
Juventus (h) - 1-0 loss
Juventus (a) - 2-1 win
Young Boys (h) - 1-0 win
Valencia (a) - 2-1 loss
Liverpool (a) - 3-2 loss
Red Star Belgrade (h) - 6-1 win
Napoli (h) - 2-2 draw
Napoli (a) - 1-1 draw
Liverpool (h) - 2-1 win
Red Star Belgrade (a) - 4-1 win
No official matches have ever been played between Manchester United and Paris Saint-Germain ahead of Tuesday night's game at Old Trafford.