Indeed, there isn't a lot for Man United supporters to be optimistic about right now, as they're set to play Leicester City in the Premier Leaguein the opening day and get set in a season which some have even suggested that'll struggle to achieve top-four in, let alone win the league title.
United finished second last season behind their rivals Manchester City.
Mourinho's transfer targets were not shared by the United board. On the other hand, a couple of their big names were linked with a move away from Old Trafford.
"I'm not confident", he told a pre-match news conference when asked whether another signing might be made.
"I like my players and my group".
"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".
"But again, the perception of the people that read can be different, but I like my players and my group".
"In pre-season it looked like I was saying something absolutely out of order, it looked like I was saying something insane", he added.
"I'd say it's a doubtful situation there", he said in regards to whether Mourinho will see out the season.
Despite slashing a club-record 60 million pounds on signing Riyad Mahrez, City has enjoyed a quiet window.
Another player who has come through an uncertain summer with United is Anthony Martial, who was left out of his France's World Cup squad, prompting comments from his agent that he wished to leave Old Trafford to safeguard his worldwide future.
Pogba has been United's skipper before, of course, but this felt different - a symbolic gesture after another peculiar week in the Mourinho era.
Manchester United return to action on August 19 with a matchup against Brighton before an early-season showdown with Tottenahm eight days later.
The former Juventus midfielder was among a handful of United players who only returned to pre-season training on Monday, after their countries advanced to the World Cup semi-finals. However, Mourinho's time in charge of the club has been filled with feuding with his players, ownership and the media.