Angel di Maria apologised to Juventus fans after defeat to Monza.
Di Maria was sent off as Monza stunned Juve 1-0 on Sunday.
The Argentina winger later posted to social media: "I want to apologise to everyone for this inappropriate reaction I had on the field.
"Leaving the team with one less in such a difficult moment of the championship made us lose the game. Losing is only my fault. I'm so sorry.
"I am a professional but also a human being who makes mistakes and knows how to recognise them."
Meanwhile, Di Maria's wife later defended her husband.
Jorgelina Cardoso posted: " Making mistakes is everyone's fault, accepting the mistake and apologizing is a virtue of a few ... ".