Record signing Slimani is due to train with his new team-mates for the first time today.
The £29m Algerian striker is unlikely to make the starting line-up but Ranieri admits he's excited about his new addition.
Ranieri said: “He's available. I've not seen him yet. He could play. I've spoken to him and he's ready because he's played all the matches for Sporting Lisbon."