Dunfermline will on Wednesday bid to upset Celtic as the Bhoys seek to cut the advantage at the top of the Clydesdale Bank Premier League.
Celtic trail Rangers by 10 points and will be expected by many to reduce the deficit to seven with victory in their game in-hand at Parkhead over the Pars, who were promoted to the top flight last term and currently sit 10th in the table.
But the visitors hope to spring a surprise on their first visit to Celtic in four years after three away wins already this season, according to midfielder Paul Willis, who said: "It's a big challenge. We just want to try and go there and get something from the game."
He added: "We've done all right - three 1-0 wins away from home - but at Parkhead it's going to be the toughest game of the season. We just want to go there, keep it as tight as possible and try and get a draw or sneak something.
"You never know. We want to go there, keep everything tight, get a chance and take it."
Dunfermline will have to triumph through adversity if they are to prevail, with defender Austin McCann becoming the latest of a lengthy list of casualties.
McCann has a hamstring injury and is out of the match, while Andy Dowie is rated 50-50.
Nick Phinn is not fit to take part despite returning to training this week, while Martin Hardie, Craig Easton, Jason Thomson, Kevin Rutkiewicz and Steven Bell remain out.
Willis recognises the talent at Celtic's disposal and expects to be defending for much of the evening, adding: "(James) Forrest has been in great form. He's looked good, but Celtic have got a lot of good players going forward.
"We just need to try and stop them scoring goals."