Since Howe’s arrival as head coach back in November, Longstaff had been limited to just two substitute appearances prior to The Red Devils’ visit to St James’s Park on December 27.
The 24-year-old started eight of The Magpies’ opening 10 Premier League matches this season. But a mixture of inconsistent form, Jonjo Shelvey’s return from a calf injury and the surprise emergence of Joelinton as an effective box-to-box midfielder have seen Longstaff drop down the midfield pecking order.
But with Isaac Hayden and Joe Willock both unavailable on Monday, Longstaff was thrust into the starting line-up of Newcastle’s depleted matchday squad.
And it took the Geordie midfielder just seven minutes to make his mark on the game as he showed impressive reactions and tenacity to win the ball off Raphael Varane in the Manchester United half before playing a pass across to Allan Saint-Maximin, who did the rest.
It marked the start of an impressive return to the side for Longstaff as Newcastle put in arguably their best performance of the season so far.
The midfielder helped The Magpies pose a sustained threat by bossing the likes of Scott McTominay and Fred in the middle of the park alongside Shelvey and Joelinton while also being calm and reliable in possession.
Against a club that were once interested in acquiring Longstaff when he was valued at £50m, the midfielder shone with a confident performance epitomised by his early assist and positive passing display.
Longstaff’s performances have been the subject of some scrutiny, particularly during Steve Bruce’s spell in charge – but on Monday, he made a statement to the new Magpies head coach with his future up in the air.
Longstaff is out of contract in the summer and could leave for free at the end of the season. If it came to that, it would be a disappointing end to one of the very few success stories to come out of Newcastle’s academy in recent years.
With the January transfer window set to open, the midfielder will be free to hold discussions with overseas clubs with a view to signing on a free at the end of the season, meaning Newcastle may have to act quickly to resolve the situation.
A potential reunion with former Magpies boss Rafa Benitez at Everton for Longstaff has also been reported.
Howe is well aware of Longstaff’s situation and spoke highly of the midfielder earlier this month.
“Sean is a very good player and he will have an opportunity to showcase his talent,” he said.
“He can show to me and the club he has a long-term future here. It’s in his hands as well not just our hands.
“He is a young player and he’s had a long association and history with the club. I recognise that. I recognise the journey he has been on through various aspects of the football club.”
Now Longstaff has impressed on his first real opportunity under Howe, he will now have to build on it in order to secure his future on Tyneside.

5. Toon interested in Larin deal
Newcastle are eyeing Besiktas and Canada forward Cyle Larin. The Magpies’ new owners are “expected” to get together with their Turkish counterparts and strike a deal. (Takvim) | AFP via Getty Images

6. Leeds and West Ham both want Dickie
Leeds United and West Ham United are reportedly vying for the signature of Queens Park Rangers defender Rob Dickie. (The Athletic) (Photo by Alex Davidson/Getty Images) | Getty Images

7. Toon plot Veretout swoop
Newcastle United are reportedly ‘preparing’ an offer for Roma midfielder Jordan Veretout. The France international is a regular under Jose Mourinho in Rome, starting 18 out of 19 Serie A games so far this season. (Foot Mercato) (Photo by FILIPPO MONTEFORTE/AFP via Getty Images) | Getty Images

8. Whites eye Simeone
Leeds United are one of the clubs showing keen interest in signing Cagliari forward Giovanni Simeone. (L’Arena) (Photo by Alessandro Sabattini/Getty Images) | Getty Images


