Arsenal captain Pierre-Emerick Aubameyang says they must shake off their nerves after drawing 1-1 with Southampton.
Gabriel Magalhaes was sent off during Arsenal's 1-1 draw with Saints and the Gunners have now had three red cards in their past five Premier League matches.
"At the moment I think sometimes we are a bit nervous because we need points," said goalscorer Aubameyang.
"Maybe sometimes we do stupid things, but I can understand. We have to stay cool in the head and try to be a little more intelligent in that case and try to stay with 11 on the pitch, because we need it at the moment.
"I am a bit disappointed because we could win this game, but then when we had this red card it was about taking this point for us and we did it.
"I think everyone was battling for it. In the end it is a draw, but it is a point that we take."