Martinez convinced Wigan players "desperate" for another Man Utd shock
Martinez believes they are just as desperate this time around given events last season.
"Nobody could have expected what was going to happen in the following weeks," said Martinez. "But last season we had such a massive need to get points we couldn't afford to look who we were playing against. Too many times in the past we'd played Manchester United and that affected us.
"The desperation factor is still there. We need to understand that 18 points at this stage of this season is desperation.
"We're not happy with that points tally, it's nowhere near good enough. There is desperation going into every game left at home this season, and Manchester United is no different."