Wigan boss Roberto Martinez refused to be downbeat despite seeing his side concede five goals at home to Manchester United.
The Latics held their own in the first half as both sides squandered chances in what was a bright and entertaining affair at the DW Stadium.
After the break though it all went wrong for Martinez and his players as Wayne Rooney
's 100th goal for United opened the floodgates.
The champions went on to run riot as Wigan, who hit the bar at one-nil down, were put to the sword in what was a stunning display from Sir Alex Ferguson's side.
While conceding his players were taught a lesson in finishing by their North West counterparts, he was able to draw positives from the game.
"We have had a big turnaround of players but I can take a lot of positives up until the point United scored the first goal," said Martinez.
"I am pleased with many aspects but disappointed in discipline. We knew United would come and try to dictate the play.
"The big difference for me was that when we conceded first goal and missed a good chance it affected us too much.
"We need to work on many things and become stronger. We need to learn as a squad together. We were too open and too naive.
"Slowly we will get there. I think it has been a big positive that we have come face to face with Manchester United and been brave.
"Manchester United took their chances and after the first goal there was no way back. In every game there will be many lessons for us.
"We are a new group together and it is early for us. Today, in my eyes, there are many, many good things for us to take."