Of Sarri's approach, Luiz added: "I love this philosophy".
It was widely expected that Morata leave the Premier League this summer, with moves to Serie A sides Juventus and AC Milan being mooted. A new philosophy always takes time.
The 31-year-old, however, insisted that he will not be forced out of Stamford Bridge.
Luiz said as quoted by Telegraph, "When I took my decision to come back here from Paris it was to win the Premier League and to do something again with Chelsea". "The way he plays suits the way I play because I like to get on the ball a lot, go forward and keep attacking, I either stay in the pockets or stay wide".
But Morata now has fresh hope that he can still be a success at Chelsea, with Sarri telling Sky Sports: "I'm still waiting for the best Morata".
"We know we don't have a lot of time to prepare for it [the new season] so we have to work hard in every training session and in every game to pick up the movements we want to do". He is trying to help us every single day to learn his philosophy quickly, to do our best for Chelsea. "We are trying to learn quickly". But it also depends on us. It depends also on us'. "It's not just like that, we're doing that every single day".
That was just Sarri's second game in charge following a 1-0 win over Perth Glory - a game in which Spanish winger Pedro also scored. "He's humble, he has his feet on the ground, he tries to learn every day", Luiz continued.
David Luiz has made a U-turn on his Chelsea future after deciding to stay at the club beyond the summer transfer window.
The Brazilian was frozen out by Antonio Conte in the second half of last season following a training-ground argument, and would have nearly certainly been forced to leave Stamford Bridge this summer had the Italian not been sacked and replaced by Sarri earlier this month. "I like playing under him".