Ruben Amorim faces ‘problems’ with Man Utd’s first summer signing with alarm bells ringing

 Gary Lineker has sounded a note of caution to Manchester United regarding their pursuit of Wolves forward Matheus Cunha. United endured a miserable campaign, finishing 15th in the Premier League and losing to Tottenham Hotspur in the Europa League final.

That defeat meant the club missed out on a possible Champions League spot and will not be able to offer European football next season.

Despite the hefty blow that failure will have on the club's transfer budget, United head coach Ruben Amorim is still looking to bolster his squad, with Cunha emerging as a key target.

Reports suggest United are prepared to activate his £62.5million buy-out clause to bring the attacker to Old Trafford. However, Lineker has signalled that Cunha might suffer from "lacking team principles and work ethic".

"He's an incredibly talented player. There's a slight question mark against Matheus Cunha in terms of managers," Lineker said on the Rest is Football podcast. "He's either brilliant or he can be accused occasionally of lacking team principles and work ethic.

"I think a couple of the managers at Wolves have alluded to that. Perhaps, I don't know him personally, but perhaps he can be slightly problematic."

In spite of netting 15 goals and chalking up six assists in 33 league appearances for Wolves, who were embroiled in a relegation battle, Cunha also grappled with disciplinary issues throughout last season, as per the Manchester Evening News.

The 26-year-old was handed a two-game ban in December after appearing to elbow an Ipswich Town staff member before removing the same person’s glasses. In March, he was also suspended for four games after headbutting Bournemouth defender Milos Kerkez and being escorted down the tunnel during an FA Cup clash.

However, Micah Richards thinks a move to United could be just what Cunha needs to put past troubles behind him. The ex-Manchester City centre-back believes that a change of scenery to a bigger club could help Cunha thrive.

"I think that 's more out of frustration," Richards said in response to Lineker's comments. "I think if you're playing with–where Man United finished this season, you can't even say a better team–but ultimately a bigger club and better players, ego is put to the side a little bit.

"I think he's perfect for that system with two number 10s. He loves drifting to one side, getting on the ball, really creative and he can see a pass, so I think he'll be a good signing for Man United if they can get him."

With Amorim downplaying the need for extensive squad renovations, it's yet unclear who else will join Cunha at the Red Devils, should he make the move.

"Without Champions League, we don't need a big squad, we can control the squad in a better way," Amorim said during United's post-season tour. "It's not going to change so much because we have the financial fair play rules.

"We are not allowed to do much this summer, even with Champions League, so we are prepared for that. It's important to stick together. We are going to struggle, it is not going to be everything right away but I have a feeling and I see the team improving and that is the most important thing."