The Senegal international will feature in his maiden game for the Blues as they face Jose Mourinho’s men on Tuesday evening
The 28-year-old joined the Stamford Bridge giants from Rennes on the £22 million ($29m) capture, as Kepa Arrizabalaga been struggling to live up to that billing despite being the most expensive goalkeeper in world football.
Having laboured to a 3-3 draw at West Bromwich Albion over the weekend, Frank Lampard’s men head to the London Stadium for the competition’s Fourth Round fixture.
In a 4-2-3-1 formation, the Senegalese will be in goal for Chelsea with Cesar Azpilicueta, Fikayo Tomori, Kurt Zouma and Ben Chilwell forming his defence line.
In Spurs’ starting line-up is Serge Aurier who will partner Moussa Sissoko, Sergio Reguilon, Tanguy Ndombele and Gedson Fernandes in the midfield.