The 19-year-old made a good impression in his long-awaited debut for the club in the 3-0 win over Young Boys on Wednesday.
Explaining his decision not to field him on Saturday, Mourinho said he would only call on Dalot to play when "totally fresh" while he adapts to life at his new club.
"I think the team is more compact, more solid".
"You see the level of the teams - you see the Liverpool squad, City squad, Chelsea squad, Tottenham squad, Arsenal improving".
'I'm not saying we are going to have more points than last season because last season we collected a very acceptable level of points. Bad results and bad performances make you look more exhausted, more upset, more ugly, more everything.
United have recovered from back-to-back defeats against Brighton and Tottenham to win their last three matches in all competitions, but Mourinho insists he still faces one of the most hard campaigns of his managerial career.
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"I think the team as a team is resolving the defensive problems better than before", Mourinho said.
All sorts of questions were being asked about Manchester United when they lost to Tottenham at the end of August, but since then they have won three out of three, all away from home. "I don't want to say our improvement has the name of Chris or Victor; the team is playing better and they are part of the team that plays these matches".
"To play for Manchester United is hard enough for a kid of 19 years old, coming from another country and after an important injury and surgery".
When you have two days, it's much, much, much more hard because everything is about recovering from the match and then preparing for the next one.
Mourinho will face a Wolves side managed by his old Porto goalkeeper Nuno Espirito Santo and a number of Portuguese players brought to Molineux by his agent Jorge Mendes.
"I am optimistic, but a hard season, yes", said Mourinho.