Like Bonaventura, Ibrahimovic is also currently off contract.
Bonaventura told Sportweek: “When he arrived, he brought the kind of enthusiasm and hunger that we'd been missing for some time. I wasn't in good shape after the injury, but when I saw Zlatan walk through the door, it made me want to break every barrier.
“We were the oldest in the squad, but he always joked I was older than him, even though I'm not! Zlatan earned everyone's respect with hard work and performances on the field.
“He's intelligent, good fun, and you know that he can be relied upon to take care of things during difficult moments. Working with Ibra in training is like an earthquake, you have to be on your toes."