Roberto Martinez insists Wigan have the physical and mental strength to survive relegation from the Premier League for the third successive season.
Two years ago the Latics finished 16th and six points above the bottom three, repeating the position in the table last season, but only after winning their last two games to keep themselves up.
And with seven games remaining in the current campaign, Athletic appear to be in a four-way battle with QPR, Blackburn and Bolton to avoid the drop with Wolves currently cut six points adrift.
But the Spaniard is aware there is still a mountain to climb, despite winning their last two matches, and taking 12 points from the last 21 on offer.
Wigan face Chelsea at Stamford Bridge on Saturday, followed by a home game with Manchester United on Wednesday, and then a visit to Arsenal a week on Monday.
"You can prepare for any game on the tactical and physical side of things," admitted Martinez.
"But there's nothing that can replace the mental side when it comes down to confidence and belief from good results.
"Right now, mentally and psychologically we are strong, we've real belief and are very confident, and that helps with every other aspect of the game.
"We're aware going to Stamford Bridge is a huge ask, and there are not many people expecting us to get anything out of the game.
"So this is a real important moment for us to realise what we have to do to be as good as we can be."
What will be the outcome in the match Chelsea vs Wigan?