Paul Merson admits Arsenal have to be at 100 per cent to win games with their current dip in form affecting their top four charge.
The Gunners were well placed to take the final Champions League spot a matter of weeks ago, but now face a season defining few games if they want to return to Europe's top table. Mikel Arteta's side had risen impressively following a poor start to the campaign.
But they have now suffered three losses on the bounce against Crystal Palace, Brighton and Southampton. That has allowed some of their rivals to steal a march and they head to Stamford Bridge on Wednesday night needing to see off Chelsea to remain in the hunt.
