Marcus Rashford was back on the bench for Manchester United's 0-0 draw away at West Ham on Thursday night.
The 20-year-old England international was criticised by Jose Mourinho, along with Anthony Martial, following last week's shock 1-0 defeat to Brighton.
Mourinho said: “The players who replaced others did not perform at a good level and, when individuals do that, it is difficult for the team to play well.
"People always ask: ‘Why always Lukaku?’ Well, now they know why always Lukaku."
Both Rashford and Martial dropped to the bench for the 0-0 stalemate at the London Stadium but are expected to play in the final Premier League games of the season at home to Watford.
They will need to produce their very best if they hope to be part of Man United's FA Cup final against Chelsea on May 19.
Rashford started in the 2016 FA Cup final in which United beat Crystal Palace 2-1.
Sheringham on Rashford
Teddy Sheringham spent four years as a striker at Man United but believes Rashford needs to leave in order to get more "experience".
The youngster exploded onto the scene as an 18-year-old under Louis van Gaal but his development has slowed down under Mourinho.
“He needs to learn what he can get away with on a football pitch, what he can do, what he can’t do. You don’t learn that by watching other people play," Sheringham said on Sky Sports after Rashford was dropped to the bench.
“I don’t care how good the players are, it’s all about experience, it’s about making mistakes along the way and coming up against these players week in, week out and knowing how to prepare to play next season and the season after that.
“But if you don’t get the experience, you don’t get the chance. All you do is sit and watch and you make mistakes later in life.
“He needs to learn now, he’s an unbelievable talent for me, and he needs to be playing in a first-team somewhere.”
Sheringham believes Rashford needs to find a club where he can play more regularly and he might have a point.
However, the 20-year-old has made 49 appearances this season and was named in the starting XI in 24 of those games.
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