The Blues striker has eight goals in 10 matches this campaign and was once again on target in the 2-0 win over Southampton yesterday.
And Hazard, 25, is also happy with his own form which has seen him net five goals in six games for club and country.
He told the Evening Standard: “Diego is on fire and we want to keep him on fire for the season.
“Diego [Costa] is on fire and we want to keep him on fire for the season”
Chelsea superstar Eden Hazard
“To reach the target we want, we need one guy to score 25-30 goals.
“I am enjoying my football. I am very happy with the performance of the whole team.
“I don’t care about me, I just want the team to win.
“I’m confident and I want to stay like this. I try to be decisive for the team.
“Against Southampton I scored and had one assist. This is what the coach wants and what my team-mates want.”
Next up for Antonio Conte’s side is the visit of Everton to Stamford Bridge on Saturday.