Former Everton midfielder Davy Klaassen suffered a nasty head injury while starring for Ajax on Wednesday evening.
The 30-year-old helped his side to a 2-1 cup victory over rivals Feyenoord, scoring the game's winning goal in the 51st minute of the match.
Taking the gloss off this win, however, were the unsavoury scenes which forced the match to be halted for over half an hour after Klaassen was struck by an item thrown at him by a supporter during proceedings. Police confirmed after the game a 32-year-man had been arrested.