The centre-back has flourished at the San Siro, helping them challenge the likes of Juventus and Inter Milan for the Scudetto. And he's unlikely to return to Stamford Bridge because of a clause in his contract.
And it was the 42-year-old who decided to cut the young defender loose, loaning him to AC Milan.
Tomori moved to the San Siro on loan and the Serie A giants have an option to buy for a fee in the region of £25-28m.
The Italian giants are expected to pay that in full at the end of the campaign, with Tomori becoming a vital figure at the club throughout his spell there.
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