Manchester United were heavily linked with a move for Morata in the summer with the striker having decided to quit Real Madrid in pursuit of first-team football.
However, Los Blancos refused to sell the Spain international to the Red Devils with Morata instead ending up at Chelsea.
Manchester United then spent big to prise Lukaku away from Everton with the striker since scoring 22 goals across all competitions so far.
And the Manchester Evening News suggest they refused to pursue Morata with real intent because of one big concern.
It is said they were worried about whether he could play the role as main man.
Morata scored 20 goals from 42 appearances for Real as they won La Liga and the Champions League last term.
But the majority of those came from the bench with Zinedine Zidane often deploying Karim Benzema up top.
United knew they needed a deadly striker after managing to score just 54 times in the league last term.
Zlatan Ibrahimovic’s serious knee injury also meant the Red Devils would have to splash the cash.
And the MEN say they chose Lukaku after he proved himself at Everton.
They were also tipped to sign Alexandre Lacazette before the Frenchman’s move from Lyon to Arsenal.
But scathing scouting reports put them off.
Lukaku, meanwhile, recently opened up on his decision to snub a return to Chelsea and join United instead.
“Because before I had a dream of playing for the manager, Jose Mourinho,” he said.
“When I was little, at age of 11, I was at Chelsea. I was talking to my mum and dad that I wanted to play for him, because I really like his personality as a manager.
“He won many titles for Chelsea and Porto and now I’m very happy that I work with him.
“Because he’s a manager who knows what he needs to do to win the match and with him I learn a lot.”