Erik Ten Hag did extra training and ran a few kilometers as a punishment which didn't really matter because what Manchester United needed was defense and cohesiveness in the team. And everyone knows Liverpool better than Manchester United but these two will surely step up the game for the clash on Matchday 3 at Old Trafford.
There is a slight advantage for United indeed with Nunez's absence in the match but with the current conditions are they still able to face Liverpool, especially after being beaten by Brenford a few days ago.
I think it will still be a bit difficult for them considering this is one of the most crucial things, especially when both clubs need to win.