The representative of the highly rated Sweden international has revealed that a host of teams have contacted the Premier League champions with a view to buying the 20-year-old
The Sweden international shone last season during a loan spell with Dutch giants Feyenoord, netting 20 goals and grabbing eight assists in just 23 Eredivisie appearances.
Unsurprisingly, the 20-year-old's performances caught the eye of several clubs and Jonsson has confirmed that Roberto Mancini's side are currently in negotiations over an exit.
"There are 15 clubs who have enquired about the options for John," the agent told Sportbladet.
"Right now there are negotiations with City. It's up to them, but I believe everything will work out in the end."
However, Jonsson went on to downplay reports of his client potentially moving to Serie A to join recently promoted Siena.
"I have daily contact with John and his father, Mike. Mike was annoyed when I talked to him," he added.
“When he read the news of Siena he asked: 'What the hell is this?' They know more than I do."