The Danish international has become an important player under Tuchel, as Chelsea continue to build on their positive start to the season.
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.
Antonio Conte is being linked to the managerial job at Manchester United, with Ole Gunnar Solskjaer's position seeming untenable.
Gameweek 9 of the Premier League featured plenty of goals, entertainment and even shock results. Check out the talking points here.
Mount completed a maiden hat-trick in Chelsea colours on Saturday, as the Blues thrashed Norwich City 7-0 in the Premier League.
The Egyptian forward, who has under two years left on his contract at Anfield, is preparing to take on Manchester United on Sunday.
Mason Mount was definitely the shining star on the day as he scored a fantastic hat-trick, with two of his goals coming after 80 minutes.
The Chelsea Academy graduate scored the opener in the 4-0 win against Malmo in the Champions League, volleying home Thiago Silva’s cross.
Chelsea beat Malmo 4-0 in the champions League group stage fixture at Stamford Bridge on Wednesday.
We are now halfway through the group stage of the 2021-22 UEFA Champions League. Here are the major talking points from Matchday 3.