MANCHESTER UNITED’S new £133million signings will transform Ruben Amorim’s first full season at the helm.But the Red Devils need to nail at least one more crucial signing to be a force again.GettyRuben Amorim is preparing for his first full season in charge of Manchester United[/caption]GettyNew signing Matheus Cunha has already impressed fans[/caption]GettyLatest signing Bryan Mbeumo linked up with United in Chicago after making his £71million move[/caption]As July draws to a close, the football world’s gaze is firmly fixed on next season – which is just three weeks away.United and their rivals are deep in the trenches of pre-season, with their recruitment teams still scouring the globe for crucial difference-makers.Amorim’s first six months were nothing short of disastrous. The Portuguese boss won just SIX Premier League games as he tried to hammer his rigid 3-4-2-1 system into a squad that simply wasn’t built for it.But this pre-season has seen some serious intent in the transfer market, with United already snapping up two proven Prem stars in Matheus Cunha, 26, and Bryan Mbeumo, 25.Both players arrive with huge experience and a track record of causing havoc in the top-flight.Below, SunSport looks at how Cunha and Mbeumo will transform United for the better, and which key position the club are still screaming out for.Will Bruno Fernandes move deeper?Ruben Amorim‘s first summer in charge won’t be judged on a pre-season 2-1 win over West Ham during a US tour, but there were plenty of positives to take from their outing at the New York Giants’ Met Life Stadium.Cunha caught eyes on Saturday, linking up particularly well with captain Bruno Fernandes, who scored twice while Jarrod Bowen got the goal for Graham Potter‘s side.EPABruno Fernandes might be moved into a deeper role once Mbeumo and Cunha fit into the team[/caption]United always rely on the brilliance of their skipper to pull them out of trouble as he scored 19 goals and registered 18 assists in the club’s worst season in 30 years. But, Fernandes might find himself in a deeper central midfield role next season, having largely impressed as one of Amorim’s two attacking midfielders in his 3-4-2-1 formation last term.New signings Cunha and Mbeumo, who wasn’t available for the West Ham game, have been tipped to take those two No.10 roles.One of Fernandes’ biggest strengths is his ability to get on the ball in deeper areas and play world-class passes to release his team-mates.One of Bruno Fernandes’ biggest strengths is his ability to get on the ball in deeper areas and play world-class passes to release the strikersAnd Mbeumo’s biggest strength comes in his ability to make off ball runs from deeper areas to break the last line and to take advantage of through balls. With a player like Fernandes, 30, providing these passes we should see a greater attacking threat from United.Fernandes has always offered versatility across the midfield and it’s hard to imagine United won’t team up Mbeumo and Cunha, who scored 37 goals between them last term, in the more advanced midfield roles.Meanwhile, Manuel Ugarte and fan-favourite Kobbie Mainoo played well together at the base of midfield against West Ham.As soon as Fernandes gets the ball in deeper positions teammates know to start making runs as the forward pass is comingAmad to become full-time wingbackNow this one is controversial because many United fans want Amad Diallo playing solely as an attacker.The 23-year-old looked as though he was set for a breakout season last term, having impressed when given a chance either as a wingback or as one of No.10s.Amad’s pace and direct running either with or without the ball were one of the keys to how effective he was in forward areas.With United looking to attack under Amorim from a medium defensive block, Amad has the ability to make long runs to overlap, as the wingback, or underlap as the attacking midfielder.Amad consistently showed the ability to overlap on the outside of the boxAmad will be used more as the right-sided wing back as Mbuemo and Cunha take up the advanced areas of the pitch.While defensively this will still cause some issues as the Ivorian is more developed in attacking areas, this will be countered slightly by the fact that Amorim prefers to use wide central defenders who are strong when isolated 1v1 defensively.Amad provides more value in the attacking phase, and given the fact that the new signings in the attacking midfield positions will draw defenders towards them, this should create more space that the wingbacks can exploit. Amad makes aggressive runs off the ball from the outsideWith Cunha and Mbuemo attracting defenders behind the striker, and with Bruno Fernandes playing deeper in the midfield, United could create the perfect environment for a player of Amad’s talents to thrive.Amorim values Amad at wing-back in games United have the potential to dominate, and the winger has previously said he’s prepared to play anywhere for the manager.Southampton and Everton were victims of this at Old Trafford last season, given both teams’ comfort in ceding possession, staying solid and finding joy on the counter. For United, having an extra forward capable of operating between the lines in the guise of a wing-back proved useful.United need a No.9The vast majority of United fans are now in agreement that Rasmus Hojlund, 22, is not the answer to United’s issues in front of goal. The question is whether Mbuemo and Cunha can bring the goals they did last season.Mbuemo finished with 20 goals and nine assists, and Cunha racked up 17 goals and six assists in all competitions.But neither of these players, however, are natural strikers. So, a true centre forward is the missing piece that United have still to add.Cunha is most effective when receiving the ball in the final third and around the outside of the opposition areaCunha is most effective when receiving the ball in the final third and around the outside of the opposition area. In these areas he provides consistent threat in terms of his ability to strike from range or find the last pass to release teammates in behind the defensive line.Mbuemo, on the other hand, creates the most threat off the ball where he makes longer runs out of possession to attack space. Mbuemo will add a dual threat in terms of making runs from different depthsHe starts his runs from the positions where Cunha likes to receive the ball but he is more likely to receive passes that are played through the last line of the defence or over the top to release runners.There is little doubt that United still need to sign a striker this window, with the club linked with a move for RB Leipzig star Benjamin Sesko.The £70million-rated striker has been in talks with Newcastle, with the parties looking to reach a verbal agreement.Now, according to Sky Sports Germany, United are also in discussions with Sesko’s representatives.They need a player that has the power and presence to pin the backline deep and to provide the space for the attacking midfielders and wingbacks to exploit as they move forward.ConclusionThe signings of Mbeumo and Cunha are positive steps from United with their Premier League experience adding real quality to the squad. This will, however, affect other players already in the squad.Although there are enough solutions to make United stronger already next term – but nothing can be worse than last season’s dismal 15th place finish.