Mark Venus insists Celtic have no excuse if they are dumped out of the Active Nation Scottish Cup by Morton tonight.
The Hoops travel to Cappielow for a fourth-round tie that has been postponed twice due to the big freeze.
Celtic's injury woes have increased in the meantime, with Scott McDonald, Stephen McManus, Danny Fox and Ki Sung-Yeung joining Scott Brown and Shaun Maloney on the sidelines.
They are also not in the best form, having won only one of their last five games in all competitions.
But assistant manager Venus said: "We're ready for the game. We've got X amount of footballers. We want the game to be on. There are no excuses."
Venus, who was also Tony Mowbray's right-hand man at Hibernian between 2004 and 2006, admits Cappielow will be "a little bit foreign" for some of Celtic's players.
"It should have an old-fashioned cup atmosphere, which should be good," he said.
Meanwhile, Neil MacFarlane will urge his Morton team-mates to set their sights higher than knocking Celtic out of the tournament.
The Ton midfielder said: "We've got to believe that we can go on a run to the final. We have to look after this game against Celtic first, but we have to believe in ourselves that we can do it."