The result ensured United completed the festive period with ten points from a possible 12 and Giggs was quick to praise Sir Alex for the way he has managed to keep the team fresh during a spell of four games in ten games.
"We've got a good squad and the manager has rotated things right for the games. We looked fresh against Wigan and that's credit to the manager," added the veteran.
"You never know what you're going to get when you've got four games in ten days when it comes to injuries and fatigue, and you have to take your hat off to players like Carras [Michael Carrick] and Patrice [Evra] who have played in every game and worked really hard."
"Everyone is working as a team - we score goals as a team and we defend as a team, and I thought all over the pitch we worked really hard and limited Wigan to very few chances."
- Ryan Giggs