Atalanta plans to punish Ademola Lookman after the Nigeria international went AWOL this week.
Lookman is keen to leave Atalanta for Inter Milan this summer and has left Italy after missing several training sessions.
According to Football Italia, Atalanta is preparing legal action and a substantial fine against the winger, considering his behavior unacceptable.
Inter Milan, meanwhile, are expected to submit a stronger bid after their initial offer was rejected last week.