William Gallas accepts that Arsenal face an uphill battle to win the Premier League but insists the Gunners are still capable of winning the title.
Chelsea's 2-1 victory over Arsenal on Sunday took them one point above the Gunners into second while Manchester United's win over Liverpool earlier in the day sent them five points clear at the top of the table.
Arsenal are now on their worst run for nine seasons having failed to win in five league matches, picking up just four points.
But the top four have all reached the UEFA Champions League quarter-finals and Gallas believes this could play a factor in the title race so the Gunners' skipper has urged Arsenal to keep fighting.
"We can still win it. It is not finished yet, so we have to believe," Gallas told Arsenal TV Online.
"It will be difficult for us to come back because Manchester United now have six points (on Arsenal) - but we have to. We must play until the end of the season and then see.
"Maybe they can drop some points because of the Champions League - they can be tired, Chelsea too. We have to give everything until the end."
Sunday's defeat was only Arsenal's second in the league this season and Gallas insists the Gunners should not be disheartened having been on top at Stamford Bridge before Didier Drogba struck twice late on.
"Why do we have to be down?" asked Gallas. "Football is like this. You never know. You can be back. They can lose some points.
"We have to be ready for the next game and do not give up.
"We made some mistakes (against Chelsea), and sometimes it is difficult to understand. Normally we do not do things like this," he added.
"But if you do not have the luck, it is not easy.
"Maybe we deserved to win because before they scored we controlled the game. After their goal, we went down."
Yeah capt. Its been like this recently. "You believe" or "we hope" or " we still can win it" ...but when the time comes...we fucked it up.
sad case... even if we win all matches, chelsea will still b the one in pole position.. so its reali no chance... unless... eat $$$ again..