Jurgen Klopp's Liverpool did reach they Champions League final, which they lost to Real Madrid, but Mourinho is still bristling over the perception of last season as a disappointment for United, who also lost the FA Cup final to Chelsea.
Part of this can be explained by the fact one of the 20 Premier League clubs - Tottenham - saw no incomings, the first time this has happened since the summer transfer window was introduced in 2003.
But he was quick to point out his United side were closest to runaway leaders Manchester City last season, even if they finished 19 points adrift. I don't think just because they haven't signed a centre-back we should be sat here thinking "We'll let Manchester United off the hook, they shouldn't be challenging this year".
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". "I have to focus on the players I have and the next few matches". It is time for me to stop thinking about the market because the market will be closed.
"I will have to focus on the players I have in relation to the first three matches, because after Spurs there is an global break and I have a couple of weeks to recover people and prepare them better".
"They returned on Monday", he said.
"Because it is very important how they feel and to understand how they think they can help or not help".
"My view is that, first of all, it is hard for me to believe we finished second because when I listen, when I read - not much but sometimes I do - you [the media] are capable of making people that finish second look like they were relegated, and people who win nothing, finish below us, you make them look like serial winners".
"Is hard for me to understand, to feel, to believe we finish second".
I've spoken to Pep twice on Sky since the end of the season, we did a programme the other day with Dave Jones and Jamie Carragher asking questions.