He has done exactly that, with four wins from four so far in the League for Chelsea FC this season.
Sarri's positive outlook - and not just in terms of his coaching - have helped to rejuvenate the Blues career of a player who was so pivotal in the title triumph of 2016-17. However, the 31-year-old has been reinstated in the starting line-up after the arrival of Sarri and he is apparently relishing working under him.
Chelsea have defeated Huddersfield, Arsenal, Newcastle and Bournemouth, and are one of only three teams to boast a 100 per cent record.
Maybe the most pleasing aspect of his short reign though is hanging on to star man Eden Hazard after constant speculation over a move to Real Madrid.
"Look at the Champions League in 2012".
As reported by the London Evening Standard, Willian said: 'A lot of people, they say a lot of things, but I never said that I wanted to leave Chelsea, never.
Despite his side starting their Premier League campaign in excellent form winning all four of their opening fixtures the former Napoli coach believes it will be very hard for his team to make up the 30 points they finished behind Guardiola's City last season. "For the moment, the captain is Azpilicueta, I will tell you the final decision after I talk with the players and club".
Sarri arrived at Stamford Bridge in July and has hit the ground running, winning all four of their league matches prior to the worldwide break.
"I think he has the capacity to make history for Chelsea again".
While it could be argued that they are yet to be properly tested so far this season, they can only beat what is put in front of them.