Asked whether he he believed there would be any movement in or out of Old Trafford on deadline day, Mourinho replied: "The information I have is no".
United have endured a hard summer transfer window as they have tried and failed to sign a host of defensive targets, with Tottenham centre-back Toby Alderweireld and Leicester's Harry Maguire among the names on their wish-list.
Both clubs finished below United last season in the Premier League yet Mourinho claims they are projected as "serial winners" despite failing to land a trophy since 2012 and 2008 respectively. "It is time for me to stop thinking about the market", he said.
Mourinho revealed he will be without six senior players for the game against Leicester. We go with everything we have in that first match.
"It is hard to believe that we finished second. [Sergio] Romero, [Antonio] Valencia, Marcos Rojo, [Diogo] Dalot, Ander Herrera, [Nemanja] Matic [are injured] and I think that's it".
"So it's hard for me to understand or to feel or to believe that we finished second, which I keep saying that I - and sometimes it's also hard to believe - that I won eight championships and three Premier Leagues".
"Because it is very important their feeling and to understand how they think they can help or not help". In football, you need time to work and players on the pitch to work and we didn't have until now.
Manchester United have been hit by injuries throughout the pre-season tour of the United States and there are plenty of first-team stars that have only just returned from their holidays due to exploits in the World Cup this summer.
"It looked like I was saying something absolutely out of order, something insane, I repeat: Pre-season hard when you don't have your players to work, that's as simple as that".