José Mourinho has placed Marcus Rashford, Luke Shaw, Jesse Lingard and Anthony Martial in his direct firing life after criticising all four Manchester United players.
The Red Devils boss has taken aim at the quartet, in which he blasted the current crop of young players as "spoilt kids" and that they have "an easier environment" compared to former footballers at the club.
"They are lacking maturity," he told Univision.
"And let me be clear when I say maturity, I mean maturity on a personal level.
"We had more men, we were more mature, we were more prepared for life, we were less protected.
"They are spoilt kids now, the kids of today have a different life, an easier environment and I'm talking about the people around the players.
"These people give them too much affection and too many excuses. People mature much more slowly now.
"Luke Shaw, he's got big potential but doesn't know how to behave. Big potential, yes, big potential.
"We're talking about Luke Shaw, Martial, Lingard, Rashford -- young, big potential, but at the end of the day it results in the word I cannot say [cojones], but you use it a lot here... character, personality, they lack a little."
The former Chelsea boss has been experiencing a rough start to the Premier League season so far, with United sitting in eighth place after 12 matches.
The Red Devils suffered a 3-1 defeat to Manchester City before the international break, which now leaves them 12 points adrift from the Premier League leaders.
United are back in action tomorrow against Crystal Palace.
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