"We are looking forward to Sunday now and we will be trying to make it a perfect week for us," Szczesny told Sky Sports News.
"We have got two clean sheets and two results against quality opposition, one away from home at one of the toughest venues in Europe.
"It would be amazing to get nine points from these three games, when probably not a lot of people expected us to do. There is not a better time for us to go to Old Trafford."
Arsenal are currently top of the Premier League by five points.