Watford earned a tidy windfall from Jadon Sancho's move to Borussia Dortmund last summer.
The Manchester Evening News says Manchester City sold the 18-year-old winger to Borussia Dortmund for around £8million in the summer of 2017, after the Londoner decided against signing a lucrative new deal.
City paid around £66,000 for the player when he was a dazzling 14-year-old at Watford, who also picked up around £800,000 as their cut of the sale to Dortmund.
There is now talk of a £100million price tag on his head, with Manchester United, Arsenal, Liverpool, Spurs and Chelsea all said to be interested parties.