Former Feyenoord coach Rob Jacobs has warned against moving for Manchester City striker John Guidetti.

The Swede, currently on-loan with Celtic, comes off contract at City in June and is a confirmed target for Feyenoord chief Martin van Geel.

However, Jacobs has been tracking Guidetti's form in Scotland and doesn't believe he can add anything to Feyenoord next season.

"I would not invest a single euro in him," said Jacobs.

"Something is wrong with him. He is not what he used to be."