The 21-year-old has starred on loan at Boro’s Championship rivals Nottingham Forest since joining last September.
MIDDLESBROUGH are reportedly demanding a club-record transfer fee in order to sell Arsenal, Tottenham and Bayern Munich target Djed Spence.
Spence, who has been called up to England’s Under-21 side as a result of his stunning form, has chipped in with three goals and five assists in 33 games for the Reds.
He earned rave reviews for his performance in Forest’s shock FA Cup third round win against Arsenal in January.
His performance led Mikel Arteta to explore a possible January swoop to provide competition for Takehiro Tomiyasu.
And their North London rivals Tottenham also weighed up a move for the youngster due to Matt Doherty and Emerson Royal struggling.
Both teams remain interested in securing his services in the summer, along with Bundesliga leaders Bayern Munich.
And Italian giants Inter and AC Milan have also sent scouts to watch Spence in action this season.
According to the Daily Star via the Express, Boro are prepared to cash in Spence, with Arsenal and Spurs leading the race to prise him away from Teesside.
But Chris Wilder’s side will demand a club-record £20million for Spence, who joined in 2018 after being released by Fulham.
Boro’s current record departure is at £18m when they sold Spanish winger Adama Traore to Wolves in 2018.
Spence will be allowed to depart the Riverside Stadium due to the rise of full-back Isaiah Jones.
Gunners starlet Gabriel Martinelli has labelled Spence as the best opponent he has ever faced.
Asked by The Athletic to name his most difficult rival, the Brazilian forward said: “Actually the guy from Nottingham Forest, Djed Spence, who I played against in the FA Cup.
“He is very strong, good on the ball, calm and quick.
“I was surprised – he is a really good player!”