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Gary Neville believes Manchester United 's teenage sensation Anthony Martial has transformed the team.

The Frenchman has scored five goals in four appearances since joining the club for £38m on transfer deadline day - a world record fee for a teenager.

He failed to score in the 3-0 win against Sunderland on Saturday but led the line expertly and provided a focal point for Louis van Gaal's side.

And former United right-back Neville has been impressed with the how easily Martial has fitted in at the club.

"He's made a big difference," Neville told Sky Sports. "He's transformed the front end of the team.

(Image: Matthew Peters/Man Utd) (Image: Alex Broadway/Getty) (Image: Martin Rickett/PA Wire)

"When he signed we knew he was going to be an exciting signing but we didn't think he would settle in so quickly.

"I watched him on Saturday and what actually shocked me in the game was the elements of the game I did not expect.

"He was playing against John O'Shea and Younes Kaboul, both six foot two, both strong lads, both physical. I was expecting him to get pushed off the ball.

In pictures - Manchester United 3-0 Sunderland:

"John O'Shea was giving him a right nudge in the back, [but] He [Martial] pinned him, turned in one movement, held him off and went past him.

"I was expecting Manchester United to have signed a winger-forward, but what they have actually signed looks like a number nine; someone who can lead the line, and, if he's not scoring goals and not running in behind, provide a point for attacks - and I never expected that.

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"In the first three weeks he couldn't have made any greater impact upon me in terms of how he's settled in, the goals he's scored, the threat he's provided, the transformation of the team, but also the fact that he can physically handle himself, push big men out of the way, hold the ball and turn in one movement.

"That's the bit that has shocked me and surprised me. It's early days and he's still got a lot to do but I think it's something he should be positive about and United should be positive about."