Newcastle boss Eddie Howe admits he managed his squad for yesterday's 2-2 draw at Wolves with an eye on their Carabao Cup tie this week.
Newcastle meet Manchester United and Howe was wary making his substitutions at Molineux.
He explained, "It was difficult for us, we had limited attacking options so what I want to do when I make a sub is try to make the team better and play players in their best positions so if I was to make changes today, it would have probably been playing players out of position and I'm reluctant to do that with the game so evenly poised.
"We're very limited with our training ground work and we have been for the majority of this season.
"We want to make sure not to overload the players but we go into each game tactically able to deliver what we need to because every game is so different."