Tomas Rosicky accepts Arsenal's title hopes are slipping away after their defeat to Chelsea.
The Gunners are now 11 points behind the Premiership leaders.
Rosicky said: "It will be difficult for us to win the title now, we know that. If Chelsea continue to play like they did against us, then it will be difficult for anyone to stop them.
"But we have to keep going. Letting our season fall apart would be a big mistake."