Ranieri famously dominated their inter-city battles during his time in charge of Roma.
"I don't have particularly good memories of him, so it would be nice to get 'revenge' on Ranieri," admitted Reja.
"Under his guidance, Inter have become truly competitive. The team follows his orders, doesn't concede many goals and even Diego Milito has rediscovered his form.
"We are facing a side in great shape, but I hope luck is more on Lazio's side than it was last season. Tomorrow night is a very important test, perhaps even decisive for our future, so we want a result."