Hazard praised Giroud's ability to hold the ball and link play, saying: "He is a target man and maybe the best in the world. They have different characteristics, and it depends on the kind of match".
"In the moment we are very risky in the offensive phase but we are not solid as I want in the defensive phase", he added.
"But I think we can do it".
Despite returning late from the World Cup, the Belgian has scored five in five, as Chelsea have started the season undefeated. We spoke yesterday and I told him he can score 40 goals.
"I think so", Sarri said when asked if he thinks Hazard can outscore Liverpool's Mohamed Salah, Tottenham Hotspur's Harry Kane and Manchester City's Sergio Aguero. He can have more energy in the last 25 metres.
They next face an away trip to PAOK in the Europa League on Thursday.
The west London club are two points clear of defending champions Manchester City but Sarri said both City and second-placed Liverpool are "better" than his side. You saw today he wasn't able to play, but I hope he can recover in the next two or three days. We can cope with the problems with the quality in the offensive phase, but not in the defensive phase. "I don't know what happened in the past but now he has a good chance".
The Italian insists that while the end goal is to make Chelsea the best team in England, it could take as long as 18 months to achieve that target with defensive issues still remaining as he overhauls the club's system to a pressing style.