As Manchester United made the long journey home from Hull last weekend, defeated and visibly chastened, Michael Carrick’s most pressing worry may well have been the early shape of his revamped midfield.

United have invested £85million this summer in Andrey Santos and Youri Tielemans, yet both were overshadowed by Hull’s far more modest engine room. Regan Slater, signed for just £50,000, and Matt Crooks, the 32-year-old EFL stalwart whose career since scoring in Middlesbrough’s shock FA Cup win at Old Trafford in 2022 has included a spell with Real Salt Lake, were the players who imposed themselves on the contest.

Carrick was keen to stress that it was only a single match, and with good reason. Back in Manchester, there was at least a significant boost as Carlos Baleba underwent his medical ahead of completing a £70m transfer from Brighton this week.

Getting to this point, however, has been anything but smooth for Manchester United. In June, the club agreed a £38m deal with Atalanta for Ederson, only to walk away after concerns emerged during the Brazilian midfielder’s medical process.

United’s search became even more complicated when leading target Elliot Anderson moved to Manchester City, a deal that appeared beyond their reach once the fee climbed to £116m. Tottenham then added to the frustration, beating them to Mateus Fernandes with an £85m offer before also securing Sandro Tonali in a £100m move.

The more their rivals have spent, the more it seemed as though United’s decision to operate within a tighter budget had allowed the Premier League’s other top clubs to leave them behind. Certainly, a move for Real Madrid’s Aurelien Tchouameni always seemed fanciful.

After Santos arrived from Chelsea for £50m in July and Tielemans swiftly followed after United triggered his £35m buyout clause at Aston Villa, it still felt as though a stellar signing was needed to excite the fans.

In the end, the search led back to Baleba, a player United had first inquired about last summer only to be put off by Brighton’s valuation of more than £100m.

In that sense, a fee of £65m plus up to £5m in add-ons represents good business for one of the Premier League’s most promising defensive midfielders – even though the 22-year-old Cameroon international struggled last season, perhaps disillusioned at missing out on a dream move to Old Trafford.

United insiders say Baleba remained under consideration throughout this summer, but only at the right price. It was not by chance that the club left it a little later in the transfer window to make their move, getting Baleba for £30m less than he would have cost a year ago.

The approach to Brighton was United’s first since then, and negotiations are said to have been wrapped up relatively quickly – even though the player has arrived with an ankle injury that means he won’t be able to make his debut against Ipswich Town at Old Trafford this afternoon (sun) or for some time after that.

‘It’s not always straightforward, and things have got to drop,’ said Carrick. ‘In the end, we’ve been patient. We wanted to get the right players in that fit the group and will take us forward, and Carlos is definitely one of them. We’re delighted to have him and once he gets going in the next two to three weeks he’ll be really strong.’

Unlike last summer, when United revamped their attack by moving decisively to sign Matheus Cunha and Bryan Mbeumo before adding Benjamin Sesko, the midfield rebuild has taken a more circuitous route with a few twists and turns along the way.

But having tied Kobbie Mainoo to a new contract in April, United have replaced Casemiro, who left as a free agent this summer, and Manuel Ugarte, who would have moved on were it not for the knee injury he suffered at the World Cup.

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Carrick has other options in central midfield. Mason Mount impressed there before suffering yet another injury setback midway through pre-season, while the Fletcher twins, Tyler and Jack, are two of the academy players working most closely with the first-team group at Carrington.

But primarily he will pick from a gang of four. Two defensive No.6s in Baleba and Santos. Two more progressive No.8s in Tielemans and Mainoo.

Time will tell if this a group capable of delivering success at a club that have struggled for years to find worthy successors to midfield stars like Bryan Robson, Paul Ince, Roy Keane and Paul Scholes.

Plenty of new signings have tried and failed: think Paul Pogba, Bastian Schweinsteiger, Fred, Morgan Schneiderlin and Ugarte to name but a few.

You may have to go back as far as the arrival of Carrick himself 20 years ago for the last great midfield signing, but the current United boss is happy with the players who have arrived this summer.

‘I think we’ve got a really good balance,’ said Carrick. ‘We’ve certainly got youth in there. And when I say youth, that comes with a lot of experience and not youth where it’s really young, with Youri and Mason to balance that off.

‘Obviously it’s picking the right balance, the right combinations, at certain times. I think it’s a really strong midfield, and a really strong unit, so I’m really happy with that.’

Santos and Tielemans won’t have been happy with their Premier League debuts for United at Hull, where they were replaced in a double substitution in the 67th minute with their team already 2-0 down. It came on the back of a 4-2 defeat to AC Milan in the final pre-season friendly, but there is every chance they will be given another opportunity to impress against Ipswich today (sun).

Mainoo was introduced off the bench at the MKM Stadium as he steps up his fitness following a frustrating World Cup with England, and it’s understood that the 21-year-old is expecting regular football after almost leaving the club last season under Ruben Amorim.

As Carrick says, the challenge will be to get the rotation and chemistry right in a season that sees United having to cope with the added demands of the Champions League.

He succeeded in the second half of last season using Mainoo alongside Casemiro after Amorim clipped Bruno Fernandes’ wings by playing him in a deeper role next to the Brazilian.

For all the talk about his age and earnings, Casemiro’s nine goals were more than Baleba, Santos, Tielemans and Mainoo combined. The 34-year-old also played more forward passes per game than Tielemans and covered more ground than Baleba.

Now he has gone, Carrick must adapt the new group to get what he wants which, based on the evidence so far this summer, is playing on the front foot and moving the ball forward quickly. It could well be the difference between success and failure.