They remain friends even though Gundogan turned down his old manager and joined City for £20million instead.
"I spoke with Jurgen about different things," Gundogan told the Daily Mail. "He always liked me as a player and I would be a liar if I said he didn't try. But when I had the opportunity to join City and work with Pep, it was quite clear that I wanted to come here.
"When I was a little bit down because of my injury, he was quite sure he was still going to try to buy me. That showed me it could never be the wrong decision to join this club. They are both great managers, great characters and very ambitious. I've been lucky."