Celtic striker Scott McDonald admits only victory will do against Champions League opponents Aalborg on Wednesday. With holders Manchester United and slick Spaniards Villarreal visiting Parkhead before Christmas, the Glasgow giants face a tough task to maintain the 100 per cent group phase home record which was vital to their progress in the last two seasons.

McDonald is targeting maximum points again, starting on Wednesday night, but he insists he and his team-mates will be trying just as hard to pick up a victory on their travels.

"Every game is a must-win, the home games especially," he said.

"I think that's where we've been strong in the last couple of years and that's got us through to the next stages of the Champions League.

"We don't want to rely on that but it would be nice to get off to a good start at home."

Australia international McDonald, Celtic's top scorer last season with 31 goals, admitted Aalborg were something of an unknown quantity when they came out of the pot as Group E opponents.

But he has every confidence in his manager's ability to identify and exploit their weaknesses.

"We don't know too much about Aalborg at the moment but I'm sure as it gets closer the manager will make sure we get a good look at them," he said.