Manchester United manager Louis van Gaal was full of glowing praise for his players in the wake of Sunday's 1-0 victory over arch rivals Manchester City.
Marcus Rashford's 16th-minute goal gave the Red Devils a narrow win at the Etihad Stadium which was well-received by van Gaal following Thursday night's tiring Europa League loss to Liverpool who were beaten 3-2 at Southampton after leading by two goals at half-time.
"I think that we have played a fantastic first half," said the Dutchman.
"We started the second half again very good and had the first chances - after that it was a test of survival because we were very tired.
"We have to recover within two days - that is nearly not possible and especially not when you play a game against Liverpool like we have done.
"We have and have given everything to beat Liverpool and then you have to play City.
"You have seen, for example, their result at Southampton - half-time 0-2, final time 3-2.
"I have not seen the match but I can only conclude that it is because of the tiredness. That is what we have done to them.
"My players have fought to the end with cramp - Marcus Rashford could still run with cramp. I have never seen that!"
Source: tribalfootball.com