The Gunners suffered a blow after losing 2-1 to Tottenham Hotspur on Sunday in the Premier League.
They must pick themselves up for a game against the champions Liverpool on Wednesday.
Arteta spoke about the team's morale with reporters and said: "It was tough [picking up the players], obviously they know what it means to everybody in that type of games.
"They felt disappointed because the way the game went, they feel that they deserved much more but as well the reflection of the game is that we lost it basically.
"But they are ready, they know the games are coming up in the next few days are massive for us and the future of next season as well and they are willing to try again and put in the same effort and commitment."