Martinez also expects many people to be wondering why his side are still in the Barclays Premier League bottom three given recent performances, but he knows they must make their superiority in games count.
Latics outplayed champions Manchester City in a rearranged clash at the Etihad Stadium in midweek but were beaten 1-0 after a flash of brilliance from Carlos Tevez seven minutes from time.
The result left Martinez's men, who have staged dramatic late-season recoveries in each of the past two seasons, three points adrift of safety, albeit with a game in hand.
Martinez said: "If you watch our performance and think Wigan Athletic are a team in the bottom three you would scratch your head. That brings disappointment.
"We have been in this position before and know what to expect but that doesn't make it easier.
"It is going to be a really tough ending of the season and for me it is the hardest battle we have had for a few years but we are ready for it.
"The performance was as good as it gets but sometimes getting the three points is out of your hands and that was the case.
"We have got things very clear. We need to perform exactly the same as we did here. If we do that the points will come, there are no two ways about it."