The 20-year-old enjoyed a breakthrough season during his loan spell at Brighton & Hove Albion last term, making 22 appearances for the Seagulls, who achieved their best-ever Premier League finish of sixth.
Following three transfer windows marked by significant spending amounting to over £1bn, the Blues must now authorise player sales to adhere to the Premier League's Profit and Sustainability (PSR) regulations.
The most effective approach to achieving this is by offloading home-grown talents, as their sales can be recorded as pure profit in the club's financial accounts.
However, while Colwill himself has come through the ranks at Chelsea, Mauricio Pochettino appears determined to keep the highly-rated defender at Stamford Bridge and boost the club's financial reserves through other sales.
Chelsea to sell four players to keep ahold of ColwillAccording to Football Insider, Chelsea are prepared to bid farewell to academy graduates Ian Maatsen, Trevoh Chalobah, Armando Broja and Conor Gallagher to improve their financial standing and keep ahold of Colwill this summer.
Liverpool are believed to have tried to sign Colwill in the winter transfer window and could now return for his services, with Joel Matip looking likely to depart Anfield in the offseason.
The report adds that Maatsen, who is currently enjoying a successful loan spell at Borussia Dortmund in the Bundesliga, has been priced at around £30m by the Blues and is expected to be put up for sale when he returns this summer.
Chalobah has struggled to secure a regular place in Pochettino
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