Left-back Joe Bryan secured a reported £7m switch from Bristol City after a strong season in the Championship and will hope to form a strong partnership with the highly rated Ryan Sessegnon, while Timothy Fosu-Mensah strengthens Fulham on the right side of defence following a loan departure from Manchester United.
"I am not confident", Mourinho told a news confernece ahead of Leicester City's visit to Old Trafford on Friday, the first match of the 2018-19 Premier League season. "It is time for me to stop thinking about the market", he said. I repeat: "pre-season hard when you don't have your players to work, as simple as that".
"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 had warned it would be a "difficult season" if United did not make any more acquisitions and it now looks like his side will miss out.
But this was only a "soft" closure - with some deals still able to be completed after this deadline.
The lack of new signings will compound issues surrounding his squad for the start of the Premier League season.
"They returned on Monday", he said. "They trained on Monday, Tuesday, Wednesday and today, so you can imagine that they're not really fit and ready, but we have needs", said the boss of the quartet.
Marcus Rashford, Victor Lindelof and Romelu Lukaku returned early and should be available. 'When I listen, when I read, it's hard to believe we finished second because you are capable of making people who finish second (sound like we) were relegated. "When I listen, when I read, not much but sometimes I do, is hard to believe that we finished second, because you are capable of making people that finish second look like they were relegated, and people who win nothing, finish below us, and you make them look like serial winners". Sometimes its also hard to believe I won eight championships and three Premier Leagues, and I keep thinking the second position a year ago was one of my biggest achievements in England'. "I won eight championships and three Premier Leagues but I keep feeling the second last season was one of my biggest achievements in the game".