The Frenchman's comments came after the Gunners were held to a 3-3 draw in the north London derby with Spurs last night, despite being 3-1 up in the first half.
"We had a fantastic attitude and a great first half," Wenger told the BBC afterwards. "We dropped physically in the second half because of a massive disadvantage we had, playing two games of the stature we played in the last three days."
Arsenal are now third place in the League, level with Chelsea and six points behind Man Utd with just five games to play.
"[The title] is open. Completely open," said Wenger. "Of course we can do it. This team has an outstanding attitude and we will fight like mad for the next game."
Arsenal face Bolton away on Sunday. Kickoff is at 16.00.