Crusaders manager Stephen Baxter has urged his players to stay "switched on" during the second leg of their Europa League second qualifying round tie against Fulham at Craven Cottage.
"It's important that our players stick to their jobs and we stay in the game for as long as we can," said Baxter.
"We must make sure we are not overawed and give a good account of ourselves.
"We are talking full-time against part-time here and it would take a mighty bit of good fortune to cause an upset."
The Crues trail the Premier League side 3-1 after last week's first leg at Seaview.
"It was good to get out and get a feel for the pitch on Wednesday and training has not been a problem in recent weeks - it's been easy to motivate the players, they don't want to come off.
"We know we are up against it but we were pleased with our performance last week and the penalty decision in their favour at the end probably made it a flattering scoreline.
"They are firm favourites but we need to sustain their pressure and play our way into the game and get a feel for the surroundings and the atmosphere.
"You only have to look at their team and all their international stars, so we know all about them and know what to expect.
"I've had to tell our players to put their cameras away as they're acting like tourists but it's a good exercise in building team spirit ahead of our own domestic season," added Baxter.