Salah won the Golden Boot last season and Sarri is backing Hazard to dethrone the Egyptian this campaign.
"Olivier's a target man, maybe the best in the world; I think so", said Hazard.
"I told him for me he can score 40 goals but to spend less energy far from the goal and play in the last 25 meters, " Maurizio Sarri explained according to UK Sun.
Chelsea's striker dilemma has been diminished in significance by the blistering scoring form of Hazard, whose man-of-the-match performance against Cardiff took his tally to five goals in five Premier League appearances this season despite completing 90 minutes only twice.
Eden Hazard had a pretty good summer with Belgium as he helped them to third in the World Cup with three goals and two assists as they beat Brazil on the way to a semi-final loss against eventual winners France.
Despite Chelsea's fluency in attack, Sarri is aware the Stamford Bridge team must improve their defending.
'Only eight players arrived for training at the beginning of the pre-season, so I think it's normal that in this period we have some defensive problems, ' Sarri said.
"Eight players joined us this summer", he said.
The Italian boss wants to turn Chelsea into the best team in England but says Liverpool and defending champions Manchester City will be the league's pacesetters. As a teenager, the Belgian had been a regular part of a good team, but upon turning 20 years of age he reached a level and has been on an nearly exclusively upward trajectory ever since.
"I thought he [Hazard] was one of the best players in Europe, but now I change my mind that he is the best".
"I think, okay, we can play better, we should play better, but we scored four goals and it's a good game for us".