Diarra insists Martin Jol's side will not switch off for a moment as they seek to finish their season in style.
"All the games are difficult in England," Diarra explained to fulhamfc.com. "There isn't a great deal of difference between the teams so we have to regard Wigan the same as the best teams and prepare seriously because they're coming to the Cottage to do a good job.
"We have to be ready and give our all to get the three points against Wigan. We have to keep playing like we have done in the last two games by working hard and playing as a Team. I hope the last five games can be really good for the Team and the fans."