Gunners boss plays down claims that rivals' busy run of fixtures will help his side in the title run-in and maintains his team must concentrate on their own football
United, who apart from challenging for the Premier League, are also looking to secure the Champions League and the FA Cup, allowing them to emulate their treble-winning feat in 1999.
The league leaders will play three crucial games against Schalke (home and away) and will visit the Emirates on May 1 in a short space of time, leading many to believe it could hinder United’s chances of winning the treble.
Wenger, however, is not an advocate of that idea.
"The schedule is not too bad for them because they play Schalke on Tuesday night and they are super-favourites to win that semi-final," Wenger told reporters.
"I am not even sure they will be completely out of resources against Schalke. I don't know. But until then the most important thing for us is to get as close as possible.
"Their schedule can be a handicap, but will it be? I don't know. When you have momentum it can be helpful as long as everything goes for you - they had that in 1999, where the championship was very close between us and them.
"What has changed between 1999 and today is that every game is much more difficult in the Premier League, especially for Manchester United away from home like anybody else.
"The games are not like before - it is much more difficult for everyone away from home now.
"The only thing I do know is it will be only helpful to us to win our games, so we just have to focus to try and win our games. For the rest of the teams, we cannot look too much."