Tillman is widely expected to become a free agent in the off-season, but the player said that he is on good terms with the club and is confident that he will stay.
"In a perfect world, I will finish as a Bear," he told 670-AM. "I guarantee you I will retire as a Chicago Bear. I guarantee that.
"The Bears and I are in good spirits. There's no bad blood, there's nothing. We are in good spirits. There's no bad blood with myself or coach Marc Trestman. Like, everything is good. We're are all on good terms."
Tillman has been with the Bears since 2003.