Can Wigan pull the tricker today?

[DarkNite]

Wigan supposed to win the match against Chelsea.
Today is another tough day for Wigan. I know Wigan lost big last time against ManU.
I wonder if it will hurt Manu if they lose this game.
Apr. 15 V Aston Villa
Apr. 22 @ Everton
Apr. 30 @ Man City
May 6 V Swansea
May 13 @ Sunderland.