The left-back has been a top target for Antonio Conte and will provide much-needed competition for Marcos Alonso at Stamford Bridge.
According to the Evening Standard, the Brazilian has agreed to join Chelsea on a four-year contract and will be paid around £42,000-a-week.
His arrival will also see Kenedy move to Newcastle on loan.
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Footage from the 23-year-old’s previous campaign shows he offers a serious threat going forward, something that will suit Conte’s style of play.
He possesses impressive dribbling skills and can kickstart counter-attacks – much in the vein of Victor Moses.
The defender can also play out from the back and uses his pace to get out of tricky situations.
Chelsea transfer news: Potential ins and outs before the deadline
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And he may not be the only Roma star making his way to the Premier League this month.
Sky Sports Italy claim the Blues are looking to snap up striker Edin Dzeko as a back-up for first-choice forward Alvaro Morata.
The Bosnia and Herzegovina international will reportedly hold discussions with his team tonight about a prospective move.