The Gunners' start to the campaign was their worst in Premier League history, conceding 14 goals and claiming just four points from their opening five matches.
The Frenchman is now urging his players to reproduce their fine form in their final four games.
He said: "After losing four games in the first seven, to be where we are today is a remarkable achievement.
"Now our target must be to better what we did last season.
"A strong finish will be important for that reason, and also to give us the belief to enter 2012/2013 with confidence."
Arsenal face Chelsea at the Emirates Stadium on Saturday.