Mourinho has repeatedly made clear that he wants executive vice-chairman Ed Woodward to bring in at least one more player, though, particularly in the heart of defence where he feels that he is light.
"I'm not confident and the market closes today," he said at his pre-match presser ahead of Friday's opening Premier League match against Leicester City.
"So it's time - at least for me - to stop thinking about the market because the market will be closed, so I will have to focus on the players I have in relation to this first couple of matches.
"Maybe it's three matches because, after Spurs, there is an international break. It gives us a couple of weeks to recover people and to prepare people better and to focus on the players that are available.
"So I'm not even thinking about that list of injured players – [Nemanja] Matic, [Antonio] Valencia and so on. I focus just on what we have and we go with everything we have to the first match."
Pressed if anything will happen on the final day of the transfer window, Mourinho replied: "The information I have is no."
Mourinho could be without a number of star men for Friday's home clash with Leicester.