Albania international Manaj is currently on loan at Pescara from Inter and has made nine appearances but only three starts in Serie A this season.
However, off-field incidents and training ground bust-ups continue to dog the 19-year-old and Oddo has clearly had enough, dropping him from the squad to face the capital club and warning the rest of his players that he will not tolerate poor behaviour.
"Manaj is not in the squad list because of disciplinary reasons. I won’t get into the details," he told reporters. "From now on those who aren’t working in the same direction can just stay home.
"I will rely on those who give their all. Only those who want to give their all will face Roma tomorrow.
"I’d prefer to bring along a kid from the youth team than someone who doesn’t know how to behave. If you behave and believe in the cause, then you will be called up."