Lukaku joined Manchester United from Everton for an preliminary price of £75million in the summertime.
His Old Trafford occupation has began with a bang, as he recently sits top of the scoring charts within the top-flight with seven objectives.
However, Mariner says Manchester City’s Sergio Aguero, Tottenham’s Harry Kane and Chelsea’s Alvaro Morata are all higher frontmen.
“If you think about a No 9 and what his role is, I just think the three lads that I picked, Morata, Kane and Aguero, I just think their hold-up play is better,” the previous Arsenal guy stated on ESPN FC.
“There’s no doubts that Lukaku goes to attain so much of objectives at Manchester United with the provider that comes into the field.
“But I don’t suppose he’s as scientific a finisher as the opposite three lads.”
Mariner selected Aguero because the Premier League’s No 1 striker and says he’s one of the most efficient on the earth.
“I think what he’s done this season is I think he’s added to his game,” Mariner added.
“His ratio from probabilities to objectives may be very, very prime.
“What he’s additionally added is that he’s added hyperlink-up play to that and a few play the place he’s just a little unselfish.
“I simply really feel he’s one of the most efficient on the earth.”