Dusan Vlahovic underwent successful surgery in London for a high-grade injury to his left adductor and will be sidelined for around four months, with Juventus confirming his immediate start to rehabilitation.Juventus also announced that Federico Gatti faces six weeks out following his own procedure, while coach Luciano Spalletti must field Kalulu and Koopmeiners in defense and David and Openda in attack as the team prepares for Spalletti's return to Napoli, having won three straight matches including a 2-3 Champions League win over Bodo Glimt and eyeing a rare victory against Napoli.