The Blues have made the trip to the Stadium of Light for this evening’s Premier League clash.
Antonio Conte’s side can go six points clear at the top of the table if they claim their tenth consecutive league victory tonight.
But Conte and co have been handed an injury worry with Luiz in discomfort in the warm-up.
The defender needed to be attended to by the Chelsea physio team after going through his pre-match preparations.
Luiz has serious strapping on his right knee and thigh following the horrific tackle on him by Sergio Aguero in Chelsea’s 3-1 win over Manchester City earlier this month.
Chelsea have Branislav Ivanovic and Kurt Zouma on the bench this evening.