Terry makes his first visit to Eastlands since last season's infamous fall-out with ex-pal Wayne Bridge over his affair with Vanessa Perroncel.
Ancelotti said: "I don't know what sort of reception JT will get but he won't have a problem dealing with it.
"I'm watching the same John Terry as last year. On the training ground and on the pitch, he is always focused. Nothing has changed. He is a good leader."