Belgium manager Roberto Martinez has hailed Romelu Lukaku for the mental strength he has shown during his early career at Manchester United.

Lukaku was an immediate hit when he joined the Red Devils in a £75million move from Everton last summer – scoring 11 goals in his first ten games for his new club.

But the 24-year-old has since become a victim of his own dazzling start. His consistency in front of goal has slipped and he has scored ten goals in the 28 games since his opening flurry.

Scoring 21 goals by March is still a decent return, but his recent form has led to many fans questioning Lukaku’s value for money.

But Martinez, who got the best out of Lukaku during his career as Everton boss, says the striker has shown great character in his first season at Old Trafford.

Following his match-winning brace in the FA Cup against Huddersfield, Martinez told the Alan Brazil Sports Breakfast: “I’m absolutely delighted for him.

“When you go to a new club you get a difficult environment, it was a big transfer fee and away from football you have to mature very quickly.

“I think Romelu has done an incredible job to go to Manchester United and perform in the manner he did in the early months.

“As always, you’re going to get ups and downs as a team but then individually to face adversity and to keep showing a level of consistency on the pitch is important.

“Those two goals [against Huddersfield] were clear examples of what he is as a footballer. He is a player that, when given that space, he is very difficult to stop and then he’s got that composure and poise in the box to be clinical finisher.

“I’m delighted to see that he has overcome that psychological aspect of playing at Manchester United.”

Martinez also told Man United fans they should be excited about the relationship that is blossoming on the pitch between Lukaku and new signing Alexis Sanchez.

The Belgium coach is himself excited about the way they have combined in only a few games together and believes that can become a lethal partnership for the Red Devils.

“What I’ve seen is that there is a natural relationship developing between Alexis Sanchez and Romelu Lukaku,” he added.

“You need that in any attacking play in any team, you need players to hit it off and have a real good understand of each other.

“It was really nice to see, especially against Huddersfield.

“There’s a really good combination between two players who haven’t played with each other for very long, but you can see there is something special between them.”