United went ahead in the first half from the spot through Bruno Fernandes, who got to retake his penalty after his initial effort was saved, though the visitors were pegged back when Anthony Martial scored an own goal.
Despite United’s back three having stifled PSG in the first half, Solskjaer reverted to a back four to halt the home side’s growing momentum and was rewarded with a late Marcus Rashford winner.
‘I think the first half we didn’t start the game the best way, even though we had a couple of chances with [Angel] Di Maria and with [Layvin] Kurzawa,’ Herrera told beIN SPORTS.
‘I think David [de Gea] was lucky to save that ball because it was going to be a goal. After that we had a penalty against us, I don’t know if it was enough to give a penalty because I think the contact was minimal. I still have to watch it again.
‘After that we were not able to play too much because the game was all the time stopped, the referee and they [United] did right to stop the game and to take a lot of time to put the ball in play again.
‘And then after that they changed the system and we had some problems in our defence because we didn’t have too many people in our back. But this is football.
‘They did good, we didn’t score the chances we had because we changed the system at the beginning of the second half and I think we were playing very well, that was right that change of system.
‘But when you don’t score the chances you have after they are very good in transition, in counter-attack.’