The 59-year-old Sarri says "unfortunately at the moment I am not able to stop".
Luiz was consistently snubbed by former manager Antonio Conte towards the end of last season but has won his place back in Sarri's starting line up.
Maurizio Sarri has said he has been warning his Chelsea players all week about the danger of dropping points after global breaks as they prepare to resume their Premier League campaign at home to Cardiff City on Saturday. 'Fortunately, we have very strong young players; (Ruben) Loftus-Cheek, (Callum) Hudson-Odoi, Ampadu, and I'd like to give them the right space. "My feeling is that we are not a very solid team in the defensive phase, we need to improve and we can, my feeling during the training is that this team can improve".
Chelsea manager Maurizio Sarri arrives ahead of a Premier League soccer match between Chelsea and Bounemouth, at Stamford Bridge, London, Saturday, Sept. 1, 2018.
Chelsea's flawless start to the season has led to suggestions they can challenge for the title after placing fifth last term, well adrift of champions Manchester City.
Mulroney urges Ottawa to make a deal on NAFTA
She said she spoke with Lighthizer over the weekend and they agreed it would be useful for them to meet again face to face. Perdue said on C-SPAN that Lighthizer has been "very clear" about the need for the Class 7 pricing system to be repealed.
Asked which teams are in title contention, Sarri said: "At the moment I can answer City or Liverpool, at the moment. It's very hard. The gap was 30 points at the beginning of the season".
"So, I believe in this philosophy, and then after that he is a great coach". It is hard game for everyone against Cardiff.
"They have good players who could do with playing - and if they could get a game in the Premier League I think it would help their development".