Gianluigi Donnarumma has become a 'very expensive problem' at Man City - Stefan Borson

Stefan Borson warns Donnarumma's errors are unsustainable; his high wages make him difficult to move despite performance concerns.

Former Manchester City financial adviser Stefan Borson has expressed serious concerns about Gianluigi Donnarumma's form, calling it a "big problem" at the Etihad Stadium. The 27-year-old goalkeeper made another costly mistake in City's 5-goal win over RB Leipzig on 4 November, allowing Ridle Baku's shot to squeeze in at the near post. He also nearly conceded an own goal from Antonio Nusa's first-half effort.

Borson told Football Insider that while City are unlikely to make a change this season, Donnarumma's expensive wages create a significant obstacle to any future departure. "He's obviously very, very mixed at the moment," Borson said. "He's made some good saves, but he's made some very bad errors." The financial adviser suggested Donnarumma would likely need to return to Italy if he leaves, but would have to accept a substantial pay cut from his current salary.