Arsenal midfielder Francis Coquelin admits the defeat to West Ham United has served as a 'wake-up call' to everyone at the club.
The Gunners went into the current Premier League campaign full of optimism following an FA Community Shield victory over Chelsea, but were quickly brought back to reality following a 2-0 defeat to the Hammers at the Emirates Stadium.
Coquelin admits the performance wasn't up to the required standard at Arsenal, but is confident that something good can come from such a disappointing result.
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“It’s been a wake-up call for everyone. Considering the recent results we had before that, going really well in pre-season, it’s disappointing and it was not an Arsenal performance," he told the club's official website.
“However, in bad things, good things can come out too. It’s good that it happened in the first game so that now we can pull ourselves together with 37 games left. We’ve got time to put things right and that needs to start on Sunday.
“Everybody realises that we need to put more in. When you look at different teams I think a lot of them are ready. You look at Manchester City when they played against West Brom, I think they played really good football."
Arsenal next face Crystal Palace on Sunday, and Coquelin admits the Arsenal squad must 'pull themselves together' if they are to get a result against Alan Pardew's side.
The Eagles got off to a flying start with a 3-1 victory over Norwich City on the opening day of the season, but will face a tougher test at the weekend with Coquelin working hard alongside his teammates to be ready for the trip to Selhurst Park.
“We need to pull ourselves together and it’s going to be a real test on Sunday because Crystal Palace have a really good squad. We know the quality we have and we need to respond straight away," he added.
"We’ve been working really hard in training and we need to put all of the training effort into the game.”
After facing Palace this weekend, the Gunners then host Liverpool a week on Monday before making the trip to Newcastle at the end of the month.