What's going on with him then? Just signed a new contract and left out today for unknown reasons.
The 28-year-old midfielder sat in the stands during the match despite not suffering any physical problems, with reports suggesting he had arrived late for the team's meeting on Sunday morning.
"I do not talk about what happens in our dressing room or in our team meeting," Luis Enrique told Sky Sport Italia.
"The squad always comes before individual players and I am sure that what I did was right if analysed in the medium-long term.
"De Rossi did not seem prepared to play and that is why I left him out. This defeat did not happen because one specific player did not play.
"If I could go back in time, I would make the same decision. I need everyone to feel responsible, specially the players who are important to this group and this club."