"I focus on just what we have, and we go with everything we have to the first match".
"The information I have is no", Mourinho said at his pre-match press conference when asked if he expected any new arrivals on Thursday.
Mourinho warned last weekend that a "difficult season" could lie ahead if they failed to strengthen the squad before the deadline. As it stands, Alderweireld and Maguire are considered too expensive, while Bayern Munich have knocked back a loan move for Boateng.
But this was only a "soft" closure - with some deals still able to be completed after this deadline.
Rio Ferdinand has admitted that he is anxious that Liverpool FC will finish above Manchester United in the Premier League table this season. Mourinho also has selection problems for the Leicester game, with Ander Herrera, Nemanja Matic, Marcos Rojo, Antonio Valencia and Dalot ruled out because of injuries and Paul Pogba, Jesse Lingard, Ashley Young and Marouane Fellaini not considered fully fit after being given extra time off to recover from the World Cup.
"They returned on Monday. You can not expect them to be fit".
"The list that I gave you before of the injured players is an important list and today after training I will speak with that group [of World Cup players] because everybody is different physically and mentally to see how they feel, how they are and to understand if they think how they can help or not help".
"My view is that, first of all, is hard for me to believe we finished second", he said.
The Red Devils coach has cut a sullen figure throughout pre-season with the former Chelsea boss unable to hide his dissatisfaction with Brazil worldwide midfielder Fred being his sides only high profile signing.
The Portuguese believes runners-up are often portrayed as if they have been relegated and those who finish below them are presented as "serial winners".