The Sun says the Toon centre-back, 22, is on Antonio Conte’s radar for an £18million deal as the Blues boss rebuilds his defence.
Conte is looking for young, homegrown talent and his scouts have been impressed by Lascelles.
He got his first taste of the Premier League last season.
And boss Rafa Benitez wants him as a key player at St James’ Park if they secure promotion from the Championship.
He was handed the armband following Fabricio Coloccini’s exit last season.
And his form has alerted Chelsea in their search for defensive prospects.