The Gunners have lost ground on Chelsea, Liverpool and Manchester City after dropping points in their last two matches, but they have a chance to build momentum when City visit Emirates Stadium on Saturday.
"It's all to go for I think, for everybody," Wenger told Arsenal.com.
"Everybody speaks about Everton coming back on us [to challenge for fourth place]. Why should we then not come back on the teams who are in front of us?
"There's still a lot of turning games that will happen until the end of the season. But it's down to the quality of our performances.
"We don't think about the title race now, we think about winning again and [this week's results] show you how small the differences are between the Premier League teams.
"So for us just to recover in a positive way against Swansea was very important. Now from that game [let's] be positive again and win the next one."
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