Belgium striker Lukaku ended his two-year stint at Old Trafford last month after securing a £74million move to Italian club Inter Milan.
The Red Devils failed to replace Lukaku with a new signing and Shearer says this could turn out to be a mistake as Marcus Rashford is not a No. 9.
Gareth Southgates assessment that Marcus Rashford is not a No . 9 is spot on, Shearer told The Sun.
Even this season, when Manchester Uniteds main striker Romelu Lukaku left, boss Ole Gunnar Solskjaer plays Anthony Martial down the middle.
I get the feeling Marcus feels more confident coming in off the left where he does not have to play a lot with his back to goal.
There is no denying he is an excellent talent but I dont think he is a natural goalscorer. We sometimes forget he is only 21 so time is still on his side.
But he is very different to Harry Kane, who is determined and ruthless. I do not think Marcus will be bothered by the England boss words.
We have not heard from Marcus where he prefers to play and I have never spoken to him about it.
But Gareth probably would not have said that if Marcus had told him he sees himself as a centre-forward.
Premier League legend Shearer added: For England, it is not a problem because he will never play there ahead of Harry, and Marcus looked sharp against Bulgaria from the left.
It is a bigger issue for United because they have taken a huge gamble by not replacing Lukaku.
Going into the season with just Marcus, Martial and Mason Greenwood is very risky and that is a huge burden for those three to carry over a long campaign.
Explaining that he does not see Rashford as a natural No. 9, England boss Southgate said: For a long time we have almost wanted Marcus to be that option as a No. 9 but Im still not certain that is where he is happiest and where he does his best work.
Marcus is still relatively young. Over the last 12 to 18 months with us hes had a big impact on our games with a nuRead More – Source