Despite hinting at frustration at United's activity in the transfer window, Mourinho heaped praise on Fred and said he will be a player to "enjoy" this season.
Several transfer targets were identified but failed to materialise and it seems the United boss doesn't fancy his chances of closing the considerable gap on Champions City with the pool of players left at Old Trafford.
And the Portuguese coach simply suggested that the first three months of the season would prove whether his warning was right or wrong. "You will see which teams are candidates".
"At the moment words are not important".
"Let's play football and by the end of November or December, you don't need words".
Looking at the year as a whole, the club has brought in Alexis Sanchez, Brazilian midfielder Fred, promising full-back Diogo Dalot and a veteran goalkeeper, in Lee Grant, that looks set to deputise for David De Gea this season.
It leaves Mourinho to start the season with a squad broadly similar to the one which finished 19 points behind City last season, but he insists he is not as disappointed with options as some may think.
Fans have been disappointed in the owner's apparent refusal to seriously back their manager as Mourinho had made it clear how many players he wanted to bring in. Clubs from other leagues are also free to bid for Premier League players.
Rafa Benitez: I’m anxious about Newcastle
Every top flight club must assist the Premier League's host broadcasters as they gather video footage ahead of the new campaign. When pushed on if he knew of any deals happening anytime soon, Benitez said: "I have no idea".
Browns trade WR Corey Coleman to Bills for draft pick
We've all seen the return that Cleveland received from their trade with the Buffalo Bills , yet it's still too shocking. As a rookie, Coleman started all 10 games in which he played, catching 33 passes for 413 yards and three touchdowns.
Friendly Report: Bayern Munich v Manchester United 05 August 2018
Jose Mourinho , successful or otherwise, appears intent on making United the tactical counterpoint to their Premier League rivals. According to reports, Manchester United have reportedly been offered the chance to sign Bayern Munich defender Jerome Boateng.
"One lie repeated 1,000 times is still a lie, but the perception of the people is that it's true but it's still a lie".
United had seven players involved in the final weekend of the World Cup with Romelu Lukaku, Marouane Fellaini, Phil Jones, Marcus Rashford, Ashley Young, Jesse Lingard and Paul Pogba representing the club and set to return late.
"When I listen, when I read - not much but sometimes I do - it is hard to believe that we finished second", Jose said, "because you are capable of making people that finish second look like they were relegated, and people who win nothing and finish below us look like serial winners".
"I focus just on what we have and we go with everything we have to the first match".
United will start their Premier League campaign against Leicester at Old Trafford on Friday night.
Pushed on whether there would be any ins or outs on Thursday, Mourinho added: "The information I have is no (nothing will happen)".