Ole Gunnar Solskjaer has won 10 of his first 11 games in charge of Manchester United, but he will face his first Champions League test on Tuesday against PSG.
The French champions will be without star players Neymar and Edinson Cavani, but the likes of Kylian Mbappe and co will still cause a major threat.
Manchester United's players arrived at their team hotel on Monday night ahead of their important match on Tuesday.
The players looked calm as they arrived, but know that they will have to perform well to come out of the first leg of the round of 16 tie with an advantage.
PSG were seen as favourites when the draw was made in December, but since then Manchester United have gone on a winning spree under Solskjaer.
In addition, PSG have been hit with a number of injuries to key players, perhaps handing the edge back to United.
Anthony Martial has hailed his new manager's philosophy after Jose Mourinho's exit in December. 'We have got a coach who has different intentions,' Martial said. 'He is asking me to attack more. That is my job after all.'
PSG manager Thomas Tuchel spoke on Monday about the threat posed by Paul Pogba, saying he 'is becoming a true leader.'
'He's an incredible player with wonderful qualities. He's capable of making a difference,' Tuchel said.
However, former Manchester United player Louis Saha has warned United of impressive youngster Kylian Mbappe, saying that 'he cannot be stopped.'
PSG are one of the top scoring teams in Europe, and Mbappe has 18 goals from 17 games so far this season in Ligue 1, as well as three from six games in the Champions League.
Another player United will have to look out for is their former winger Angel Di Maria, who returned to Manchester on Monday to train at Old Trafford ahead of Tuesday's game.