Chelsea has fielded a predominantly strong team in Europe so far this season but the hard work is now done.
"He is a good player with a high quality, but I want more from him", Ranieri said. It was a slightly labored 1-0 victory when the sides met Greece last September; however, a couple of months working under the new boss and the home crowd could make this one run smoother.
The Blues responded from a first competitive loss under Sarri, after 18 matches unbeaten, to Tottenham last Saturday, with a fifth win from as many Europa League Group L games.
He has, however, made four appearances in the Europa League and has notched up two assists in the competition.
The 31-year-old midfielder's current contract at Stamford Bridge is due to expire in the summer and that has inevitably led to speculation that he could be on his way out of the club in January. He scored a lot of goals there, and I want the same again.
Finally, the showdown on the weekend will pit Ranieri's side against Chelsea talisman Eden Hazard and while the 67-year-old fondly remembers the Belgian superstar's strike in a different London derby in 2016 that "clinched" the title for Leicester, he hopes Hazard will have a quiet game against the Cottagers come Sunday.
Though his goal may not be enough to see him start ahead of Morata and Giroud, he is definitely at the right path to becoming a great player for the Blues.
Fulham manager Claudio Ranieri got a very good, and very important, win over Southampton last week - but this is a much tougher assignment.
Fulham manager Claudio Ranieri: "Whenever I play my former teams, it's always special".
"I think that, first of all, we approached the match very well", Sarri said.