The centre-back moved to the San Siro in January and the deal includes an option buy, which the Milan appear set to trigger.
Football Insider (opens in new tab) report that Milan have made their intention clear to Chelsea, with Tomori felt to be itching to stay with the Rossoneri.
The 23-year-old made his full Chelsea debut last season and featured 22 times in all competitions, but he found himself out of favour in the first half of 2020/21 and made a solitary Premier League substitute appearance before heading to Italy in the last transfer window.
Tomori won his first and, so far, only England (opens in new tab) cap in a 4-0 Euro 2020 qualifying victory over Kosovo in November 2019.
He’s impressed for Stefano Pioli’s side, starting 12 games in Serie A and the Europa League.
Milan narrowly went out of the latter to Manchester United (opens in new tab) in the last 16, but they sit second in the league, trailing bitter city rivals Inter (opens in new tab) by eight points but remaining well on course for a return to the Champions League for the first time since 2013/14.
A permanent deal for Tomori is thought likely to set Milan back £25 million, with that fee potentially going up to £30 million with add-ons.
Subscribe to FourFourTwo today (opens in new tab) and get your first five issues for just £5 for a limited time only - all the features, exclusive interviews, long reads and quizzes - for a cheaper price!
RICHARD JOLLY What's the worst European defeat for any English club?
Thank you for reading 5 articles this month* Join now for unlimited access
Enjoy your first month for just £1 / $1 / €1
*Read 5 free articles per month without a subscription
Join now for unlimited access
Try first month for just £1 / $1 / €1
FourFourTwo was launched in 1994 on the back of a World Cup that England hadn’t even qualified for. It was an act of madness… but it somehow worked out. Our mission is to offer our intelligent, international audience access to the game’s biggest names, insightful analysis... and a bit of a giggle. We unashamedly love this game and we hope that our coverage reflects that.
Get the best features, fun and footballing frolics straight to your inbox every week.
Thank you for signing up to Four Four Two. You will receive a verification email shortly.
There was a problem. Please refresh the page and try again.