The midfielder was linked with Arsenal and Wolves this summer.
Khedira said, "I'm convinced that I can get back to being at the highest level, otherwise you'd be talking to a pensioner and not the footballer Khedira. I can play at such a level for three more years.
“I haven't talked to any other teams. I know there's many of us and that Juve must sell. At 32 and having played just 17 games last season, I was always going to be scrutinised.
“It's always been like that for me, but I've always ended up playing. With Juve, everything was clear from the start of preseason.
“I wouldn't leave and I didn't want to leave. I heard I was only staying for the money. That struck me because then the fans believed it. I've never played for money, only to win trophies."