Four points currently separate leaders Chelsea and fourth-placed Liverpool, while the Gunners are just one point off the top of the table.
"It looks like the last game could be decisive," Wenger told the club's official website. "Nobody knows. What is for sure, the most consistent team from now on will do it.
"Everybody has big games, everybody has difficult games, the Premier League is difficult for everybody so let's just focus on our performances."
Arsenal's campaign continues this Saturday when they face Stoke City at the Britannia Stadium.