Terry is being linked with the manager's job at Bournemouth.
“I've always said right from the outset that John Terry came here to learn about coaching, he's become a very, very good assistant manager to myself," he said.
“But ultimately, he's come in to learn the trade to ultimately become a number one.
“There's been a lot of speculation over JT, he's really enjoying his work, he's a big part of why we're having a successful season this year, but if JT comes into me and asks me whether he can go then that's another conversation I have with Johan Lange and Christian Purslow.
"But, at the moment he is happy to be at Aston Villa."