Tomori impressed Milan’s hierarchy with his sterling displays on loan, bolstering their confidence to trigger his release clause.
In 30 games with Tuchel in charge, Chelsea won 19 games in all competitions, winning Champions League and placing fourth in the Premier League.
Chelsea Football Club have parted ways with manager Frank Lampard.
The Chelsea legend has endured a torrid run of recent as his team nosedived from an early title challenge to mid-table showings.
Derby County chief executive officer Stephen Pearce said Rooney was the perfect man for the job.
Spurs retains the top spot on the EPL with a point at Stamford Bridge.
The German playmaker will consequently miss tonight’s UEFA Champions League encounter against French side Rennes.
