The duo tested positive last week and missed the 2-0 first-leg victory over Spurs as well as the FA Cup win over Chesterfield.
The Brazilian defender has put pen to a new deal that will keep him with the Champions League winners until the end of the 2022-23 season.
A keenly contested and compelling London derby ended with three dropped points for Chelsea despite taking the lead twice.
Sarr signed for Chelsea two summers ago when his contract at Nice in his homeland of France expired, and he spent last season on loan at Porto.
A clinical display from the Blues in the second half saw them bag three goals and three points to go to the top of the league table.
Ben Chilwell has not made a competitive appearance since playing the Champions League final against Manchester City at the end of last season.
Bayern Munich beat Paris Saint-Germain 1-0 in the final of the 2020 UEFA Champions League, thus completing their second continental treble.
Thomas Tuchel took over the managerial role in January and oversaw a rise up the Premier League table to a fourth-place finish.
A big fan of N'Golo Kante, Kusum Kaneriya is willing to join her grandson in watching Chelsea play even at 2 AM at night.
The Brazilian international midfielder starred in Arsenal's record-breaking 2003/04 Premiership title triumph.