The Belgium international has established himself as the main man up front for the Red Devils since his move to Old Trafford from Everton back in the summer of 2017.
Lukaku has made a solid start to the new season for Manchester United, scoring three goals in four Premier League games for Jose Mourinho’s men.
The 25-year-old was on target for Belgium on Tuesday night as he netted twice in his country’s 3-0 Nations League win over Iceland.
And former Manchester United man Fletcher feels that Lukaku is developing into one of world football’s top talents up front.
Speaking in an interview quoted by the Daily Express, Fletcher said: “He’s one of the best strikers in the world, his goal record speaks for itself.
“The number of goals for his age in the Premier League, he’s Belgium’s talisman. He’s a power, he’s a presence up front.
“If you sit deep, he’ll pin you like this and roll you and score.”
Manchester United will return to Premier League action after the international break when the Red Devils take on Watford away from home.
The Red Devils are looking to make it back to back wins in the Premier League, with Mourinho’s men having won two and lost two of their opening four top-flight games this term.
Mourinho is aiming to become the first manager to win the Premier League title since Sir Alex Ferguson before his retirement in 2013.
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