Arsenal manager Unai Emery says Granit Xhaka was "devastated" after he reacted furiously to being substituted in the 2-2 draw with Crystal Palace on Sunday.
Xhaka cupped his ears and swore at supporters as he was booed off the ground.
Emery said: "It's not easy for him and for the team. He is now devastated, sad. We spoke yesterday and Sunday night and this morning.
"He trained normally with the group but he is devastated. He is sad about that situation.
"His commitment is great every time. He wants to help. His behaviour was perfect in training, with the group and club. Really he knows he was wrong.
"He feels inside, very deep. It's normal as a human. Every player needs the supporters' support.
"We need to be strong, to know and learn to play under our pressure. It's our work, our job. The supporters are the most important in our lives. If there aren't supporters and fans behind us there's no reason to play football.
"He is down. The most important now is to look after him and his family and also recover our best Granit Xhaka.
"After that wrong situation on Sunday I have one challenge every time."
When asked whether Xhaka should have apologised Emery said: "Yes. When we make individually some mistakes we need to make some apologies. I prefer to do that. We've suggested he do that.
"First is to recover him... We want him to be close with our supporters."
Despite his actions, Emery is adamant Xhaka has the necessary qualities to remain as captain.
He continued: "He has the condition to be the captain. I decided for that, the players respect that.
"He was wrong on Sunday and also did not respond as captain."
