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Herrera went on to acknowledge the importance of remaining upbeat following the Champions League defeat to a PSG team that is viewed among the favourites to win this season's competition.

Defending from set pieces, a weakness that has come to the fore multiple times during the course of the season, proved to be the home team's undoing yet again as Nemanja Matic inexplicably left Presnel Kimpembe unmarked at the far post to allow the center back to volley home a Angel Di Maria corner in the 53rd minute.

He said: "Today we weren't at the level".

Solskjaer, who had won 10 of his 11 games in charge before this clash, admitted his team were a step below the French champions.

It would have been more but for some fine goalkeeping from David de Gea.

To add to United's misery, Paul Pogba was sent off in the final minute after a late challenge on Dani Alves earning him a second yellow card which means the French midfielder will miss the second leg in Paris.

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Manchester United boss Ole Gunnar Solskjaer felt PSG's Champions League experience was the key factor in last night's 2-0 defeat. Solskjaer, who had won 10 of his 11 games in charge before this clash, admitted his team were a step below the French champions.

United was forced to adapt, too, after losing Jesse Lingard and Anthony Martial to injury for the second half. "We knew they wanted to score and we did it".

Not only was it a first loss for Solskjaer since replacing Jose Mourinho, but the heaviest-ever home defeat for United in Europe, having previously only been beaten by one-goal margins.

But having come off the bench to score the victor in the 93rd minute of the 1999 final against Bayern Munich, Solskjaer is the man who epitomised more than most the "never say die" attitude of many Sir Alex Ferguson Manchester United teams.

TNT will broadcast the Manchester United versus PSG game in English, and Univision Deportes will air it in Spanish in the United States.

PSG was expected to represent the stiffest of tests, but recent injuries to Neymar and Edinson Cavani will blunt an attack which scored a Champions League-high 17 goals in six group-stage games. "We've been talking about top four (in the Premier League), that's one thing but we want to be at the top and Man United should be at the top".

Wenger was also critical of United at half-time, before they had even conceded, saying: 'We predicted Man United's problems before the game. A repeat of that 3-0 win in Paris next month would take United through to the quarterfinals.