This article forms part of our Profit Players feature series, which is where Football Transfer Tavern takes a look at how well a player has fared since being signed or sold, using statistical figures and statements from pundits to prove how good of a deal the club managed to achieve.

Sean Longstaff made his debut under Spanish manager Rafael Benitez in the Carabao Cup second round tie against Championship team Nottingham Forest in August 2018 and has arguably not looked back since.

In the 2018/19 season under Rafa, he made 13 senior appearances in all competitions, scoring two goals and providing one assist, according to Transfermarkt.

Longstaff's relatively impressive performances throughout the campaign earned high praise from his coach, as he was likened to former Manchester United, Tottenham and England central midfield player Michael Carrick, as per The Guardian.

By March 2019, the academy product was already valued on the market at £2.25m (as per Transfermarkt), and this figure has increased ever since. By the end of that season, Longstaff's market value rose to £6.3m (as per Transfermarkt) just in time for a new season, but this time he would be playing under Steve Bruce.

The 22-year old has played in 26 games in all competitions so far in the 2019/20 campaign, netting once and providing two assists (via Transfermarkt).

Longstaff's market value reached a peak of £19.8m in December of last year and he is currently valued at £15.75m by Transfermarkt

Despite the fall in value, probably caused by the financial crisis that has affected the footballing world following the outbreak of the coronavirus pandemic, the Magpies would be set to yield a rather hefty profit if they were to decide to sell the Englishman in any transfer window.

However, Longstaff may wish to stay given that the prospective takeover in the northeast by Amanda Staveley's Saudi-led consortium from current owner Mike Ashley could still be approved by the Premier League.

Geordies, should Newcastle consider selling Longstaff for a possibly hefty profit? Comment below!