Arsenal must show their courage against Manchester City if they are to win on Wednesday night.
The Gunners take on the champions as they look to wrestle away their Premier League crown.
With only a five point lead having played two more matches than City, Arsenal know that even a draw at the Etihad Stadium may not be enough.
Ex-Arsenal and Chelsea defender William Gallas is aware of the challenge awaiting the Gunners.
On Wednesday and I'm sorry to speak like this I want to see if the Arsenal players have got b****! They need to go on the pitch b**** first," Gallas told Genting Casino.
They need to fight against a team that are on top of the world now. I want to see which players have got the balls and are not scared of the challenge. Simple."