Ole Gunnar Solskjaer can remedy the ills of Manchester United's negativity under Jose Mourinho

“The disease comes to Manchester,” was how Marca, the Spanish sports newspaper, reacted to the news of Jose Mourinho's appointment as Manchester United manager in May 2016. Anyone who questioned that at the time will better understand now what they meant after observing Mourinho's caustic, corrosive regime at Old Trafford over the past 2½ years.

His successor, interim or otherwise, was always going to benefit by virtue of simply not being Mourinho but, even then, it still requires some mental adjustment to listen to Ole Gunnar Solskjaer rejecting the bile that spilled freely from the Portuguese's lips in favour of an upbeat message that chimes with the club's long-held attitude and ambitions.

In fairness, it was not just Mourinho who told United fans they would be wise to lower their expectations. Louis van Gaal and David Moyes, his predecessors, did the same but Solskjaer scoffed at any notion of such a thing as he looked ahead to his first home game in charge, against Huddersfield Town on Boxing Day, following Saturday's thrilling introduction in the 5-1 thumping of Cardiff City.

“You can never set the bar too high,” United's caretaker manager said, repeating a mantra that must have become second nature to him during the 11 years he spent playing under Sir Alex Ferguson. “The players who play for this club have high standards to live up to. [Against Cardiff], it's not like they were outperforming themselves.”

Solskjaer, of course, will be judged on a lot more than his rhetoric but, in less than a week, he has set about chipping away at the culture of negativity and caution that took hold under Moyes, continued under Louis van Gaal and his sleep-inducing football and became entrenched during Mourinho's miserable final 12 months at the helm. “The attacking philosophy is in the walls of Man United,” Solskjaer said. “That's tradition, that's history, that's how we want to play. Cardiff was a good reflection of what we want.”

Cardiff provided a springboard and showcased a bunch of players revelling in new found liberation, and sticking two fingers up to Mourinho, but the idea that it will keep coming that easily to a team that had, over five-and-a-half seasons, become slaves to leaden, risk-averse football is probably a touch optimistic. They will have to be reprogrammed, in effect, but it will help no end that the players will embrace that process of change and that the natural inclinations of most are to attack.

Paul Pogba, Marcus Rashford and Jesse Lingard – three players who came through the academy – and fellow youngster Anthony Martial are the sort of talents plenty of prominent figures internally have felt for some time that a team should be built around and it was telling that Solskjaer put the onus firmly on that quartet against Cardiff at the same time as asking his full-backs to play high up the field. Solskjaer has some fine players at his disposalCredit: Getty Images

If United were in front under Mourinho, his default setting would be to defend what they had. He was all about the result and when those stopped coming there was nothing left but complaints, criticism and conspiracy theories. The message from Solskjaer could not be more different and it has invigorated a squad who were rotting with the handbrake on and shrinking in the face of frequent public attacks.

“They've not said anything about any handbrake but we spoke in the team meeting about how when we get one, we want to get two and when we get two, we want to get three,” Solskjaer said. “That's the nature of this team, this club. You always go and attack.

“It's not going to happen every game that you're going to create chances like we did against Cardiff but you've got to try and do that. With the blistering pace we've got up front, they had to chase the game. I don't think any team would like Rashford, Martial, Lingard, Pogba running at them.”

United have had such a hard time of it at Old Trafford this season that Mourinho was even asked recently if he would prefer to play away but the famous old ground should be a far more buoyant place to be this afternoon. The 20LEGEND banner in honour of Solskjaer, scorer of that dramatic 93rd-minute winner against Bayern Munich in the 1999 Champions League final, has been restored and the man himself is just itching to make that long walk from the tunnel to the dugout.

“Of course I have my history at the club and to see that banner is special,” he said. “I just hope that, in the next five months, I'll do a good enough job for them to keep singing my name.

“You try to keep your emotions in check because I'm there to do a job. I don't think it will be easy but I'm looking forward to it and I think the boys are looking forward to playing at Old Trafford. That's the key – we should be looking forward to playing there.”

For months, though, they have not. United have won just five of their 12 home matches this season and conceded 14 goals there. After Huddersfield, who have lost their past five games, United face Bournemouth on Sunday and Solskjaer does not want his players to feel inhibited or intimidated.

“Confidence is not something you store in the fridge and pick out,” he said. “You earn it by your performances.”

Solksjaer knows the love-in will not last if results and the football do not improve. Mourinho grew increasingly irritated by the criticism of former United players, such as Paul Scholes, Rio Ferdinand and Gary Neville, but Solskjaer does not expect the people he used to call team-mates to spare him. “Don't worry, Gary will be really hard on me,” he said. “I sat next to him in the dressing room for 11 years. He's paid now to give his opinion and he should do. I'm no different to anyone else.”

The one voice Solskjaer plans to pay real attention to, though, is Ferguson, whose influence behind the scenes should not be underestimated.

“I've spoken to him, hopefully I'll go to his or he'll come to me and we'll have a talk,” he said. “You know he's the boss. If there's anyone who can give me proper advice – not my team-mates – it's him.”

It is far too early to say the fall-out from the disease has been eradicated but it is already being treated