Sunderland have agreed a fee with Brighton for their 18-year-old winger Tommy Watson.

The fee is not being made public but sources with knowledge of the deal have told The Athletic it is in the region of £10million ($12m).

Watson, who turns 19 next week, has signed a contract with Brighton until June 2029. He had one year left on his deal at Sunderland.

Brighton appeared to have clinched Watson’s signature in January, but a deal fell through. Watson was injured then, but he has returned to…