Chelsea set for £21.5m transfer windfall as Djordje Petrovic nears exitChelsea goalkeeper Djordje Petrovic nears £21.5m Sunderland move. The 25-year-old Serbian impressed on loan at Strasbourg and seeks regular play. Sunderland, newly promoted to the Premier League, view Petrovic as a key signing alongside Noah Sadiki, Enzo Le Fee, and Habib Diarra. He’ll compete with Anthony Patterson for the starting role.