Portsmouth have been linked with Longstaff, but a move is yet to be concluded for the Newcastle youngster.
League One side Portsmouth were reportedly said to be inches away from landing Newcastle United youngster Sean Longstaff towards the end of June, but a move is yet to materialise - so should Sunderland consider an offer?
The Chronicle claimed towards the end of June that Portsmouth were interested in the 20-year-old midfielder and were close to concluding a deal, but Longstaff has since joined Newcastle's first team on their Ireland training camp.
It seems that a deal to take Longstaff to Fratton Park is some way off completion, and it should convince Jack Ross to raid their bitter rivals for the exciting young prospect ahead of Pompey.
Longstaff knows what it takes to shine in the third tier of English football and that is exactly what new manager Ross needs to bring to the Stadium of Light if the Black Cats are to gain promotion back to the Championship.
The playmaker was loaned to Blackpool for the entire 2017-18 season and had a hand in 15 goals during his 45 league and cup appearances for the Tangerines. Scoring nine, he created six.
Adding that eye for goal and ability to create at the Stadium of Light would make Longstaff the perfect summer signing for a team like Sunderland, even if it does mean that it would see Ross sign a Newcastle player.
Sunderland and Newcastle have done business in the past, the latest example being Jack Colback moving between clubs. He remains on the books at St. James' Park, but is expected to leave this summer.
Longstaff holds the key to creativity in a Sunderland side in desperate need of both additions and excitement. Beating Pompey would push Sunderland a step closer to the Championship.