Marcus Rashford has been told he needs to improve his movement if he wants to establish himself as Manchester United's first-choice centre-forward.
Rashford has scored just once from open play this season and struggled to make an impact during United's 2-0 defeat by West Ham on Sunday.
The 21-year-old's misery was compounded when a thigh problem forced him off 15 minutes into the second half.
Ole Gunnar Solskjaer said after the match that he expects Rashford to be out for a little while as a result of the injury, with United's other two recognised strikers, Anthony Martial and Mason Greenwood, facing late fitness tests ahead of Wednesday's Carabao Cup meeting with Rochdale.
Rashford has lacked a spark for United so far this season and Shearer believes a marked improvement will be required when he returns to action.
“The problem that Man United have got is that 19 games, scored 17 in all competitions, four of them were against Chelsea, and this is the reason why - because no urgency, no spark, no creativity," Shearer said on Match of the Day.
“It’s a nightmare for forwards, they were slow, had too many touches [against West Ham].
“If Rashford wants to play centre forward and he wants to score more goals, which I’m sure he does, he has to do better than this.
“His movement has to be better, he has to move for the ball and attack the ball instead of waiting for the ball.
“I’d be concerned if I was him [Solskjaer], because they’re not creating enough chances.”
