The Geordie midfielder, having been a regular under Steve Bruce at the beginning of the campaign, has played just 19 minutes for Eddie Howe so far.
Longstaff was substituted on during the 3-3 draw with Brentford, however is yet to make an appearance off the bench in the three matches since.
Howe wants the 24-year-old to have a long-term future on Tyneside, but insists it is up to the player to impress when his opportunity arrives.
What Eddie Howe said about Sean Longstaff’s contract situation
“I’m aware of that situation,” Howe said.
“First of all, Sean is a very good player. He will have an opportunity I’m sure as the fixtures progress to showcase his talents and show to me and everybody connected with the club that he has a long-term future here.
“That’s in his hands as well, not just ours.”
Sean Longstaff is facing midfield competition for his place
Howe continued: “He’s a young player and obviously has a long association with the club.
“I recognise that and the journey he’s been on through various aspects of the football club.
“We have competition in that position. Jonjo (Shelvey) has been in good form and Joe Willock has come back into the team.
“With Isaac Hayden, Sean and Jeff Hendrick as well - we have good bodies in there to fight for places and that’s very much what I want.”
The Rafa Benitez link
Rafa Benitez was the manager that handed Longstaff his first-team debut in December 2018 before his breakthrough season was cruelly cut short due to a knee injury.
In the following summer, Benitez left the club and Manchester United had their eyes on the midfielder. In truth, Longstaff has struggled to reach similar heights since.
Talks over a new contract have been held back but nothing’s materialised. At the end of the season, he could leave for free.
Indeed, Longstaff is free to hold discussions with overseas clubs in January.
In England however, It’s no secret that Benitez is interested in reuniting with Longstaff at Everton.