Crawley Town manager Steve Evans says reaching the fifth round of the FA Cup for a second year running would be akin to scaling Mount Everest.
The League Two side travel to Championship outfit Hull City in their fourth round tie on Saturday.
Evans told BBC Sussex: "We go up to Hull in good spirits but we know it's going to be extremely tough.
"Can we win? Yes. But it's going to take the equivalent to climbing Everest with my weight."
He added: "We beat Bristol City and I think 1-0 flattered them. But we had to play at the top of our game.
"If Crawley play well and Hull play well, Hull will go through.
"If Hull are just a yard off and we're at the top of our game, hopefully we'll be in the Cup on Saturday night.
"It should be about courage and wanting to play and perform. If we get a little run of the ball, who knows? It's football and the FA Cup."