Ian Holloway admits he has given up trying to work out the multitude of permutations that would keep Blackpool up.
Blackpool are 18th in the table on 39 points and are one of five teams that could be relegated on Sunday depending on results.
The Seasiders face champions Manchester United in their final game and know even a win may not be enough to keep them in the Premier League depending upon other results.
United are set to name a much-changed line-up as they prepare for the Champions League final against Barcelona next week, but whatever team they put out will be formidable.
"One of my analysts was looking at the table the other day. I said 'Good God. What are you doing? You are going to go mental'," said Holloway.
"My dad was an amateur player. He would say 'our name is on the cup'. Sometimes it is.
"This weekend, we have to do something no-one else has managed this season. Beat the champions on their own ground."
Holloway will draw strength from the display his side produced at Bloomfield Road earlier this year against Sir Alex Ferguson's team.
They raced to a two-goal lead before they were eventually beaten 3-2 but the Blackpool chief will seek to draw from the positives from that display.
"I take great motivation from the way we played against them earlier this season," he added.
"For 70 minutes we were absolutely magnificent. Then they brought on Ryan Giggs and Javier Hernandez and we ran out of steam.
"It scares me just saying that. But this is an opportunity for us to achieve the best thing we could ever have dreamed of - keeping a club like ours at this level."
What will be the oucome of Man Utd v Blackpool?
Man Utd win