The Red Devils boss has struck a frustrated figure during pre-season ahead of their Premier League opener against Leicester City on Friday night.
Mourinho's transfer targets were not shared by the United board.
United is further hamstrung with a host of key players, including Paul Pogba, Romelu Lukaku and Marcus Rashford, who were involved in the later stages of the World Cup, limiting their preseason preparations.
It wasn't particularly entertaining or engaging, but United got the job done.
It was a bright start from Jose Mourinho's side and they continued to control the game while Leicester also posed a thrat through Chillwell on the left and Maddison.
"He had the first three or four days of training and first couple of matches where he played 40 or 50 minutes".
"He's in the group of players who didn't have a preseason, it's as simple as that".
"We have to wait for end of November, beginning of December to understand how things are going and if we can fight for the title". "We showed good control, good football, a lot of chances".
"But he's got great experience, he's been at top clubs, he's been in hard positions before, he's in a hard position now I think, but he needs to try to find a way to get out of it".
Last season may have been United's highest finish since Sir Alex Ferguson retired but the 19-point gap to runaway Premier League champions Manchester City underlined the improvements required.
According to the Daily Mirror, United chiefs have told Mourinho that the club needs to be more like their neighbours - both on and off the pitch. Until tomorrow, anyway. Jose Mourinho's side recorded a 2-1 win over Leicester City at Old Trafford in a game that would make you long for the World Cup.
And when Amartey was substituted, it didn't get much better - Luke Shaw completely lost Rachid Ghezzal for his goal in the 83rd minute, while Ricardo Pereira was ineffective right-wing and only started to look like a Premier League player when switched to right-back.
"It's important to win and play well", Mourinho said.
Mark Ogden, senior writer at ESPN, says that Manchester United and their fans should "brace themselves for a bumpy ride". However, Mourinho's time in charge of the club has been filled with feuding with his players, ownership and the media.