"I know absolutely we have to do better. Instead you go to the second level players where you still have insane numbers, and where people say, and I agree, that's not what Manchester United is".
"So, who is more powerful now".
"Before the smaller clubs were nearly begging the big clubs, "Get my best players".
The youngster, signed over the summer for £19m from Porto, impressed with his first couple of appearances in a Manchester United shirt before suffering an injury over the October global break.
Mourinho compares that situation to the one that exists now, where United can, theoretically, be interested in Tottenham skipper Harry Kane, but have no chance of completing a transfer for the England forward. 'It was not that kind of injury, some players with that kind of injury do not play for two weeks but Marcus, I am pretty sure will be fine for the next one.
The former Spurs midfielder stated that the trajectory of both clubs so far this season and in recent years suggests that the move away from Tottenham will be a step down for the player.
"Which is, I need a right back and a left back".
"That's not just because Manchester United was fantastic, but because there was a big difference to the others and now it is not like that".
The Portuguese was forced to bring the 21-year-old off during United's 2-2 draw against Southampton, with the youngster complaining of "fatigue", and replaced him for Anthony Martial as the Red Devils pushed for a late victor.
"The transfer market is very hard unless the clubs want to go to what I call insane numbers. They keep going to complicated football".
The result means Manchester City are 16 points ahead of their rivals at the top of the table, while United could be nine adrift of the top four if Chelsea beat Fulham on Sunday and Tottenham draw with Arsenal. The players they don't understand that simplicity is genius, especially in some parts of the pitch.
Now the Chilean is out until the middle of January with a hamstring injury. "We expect the new year brings better things for him".
Mourinho said: "I don't like and don't believe in the word curse but he has had a very unlucky six months".