Tournament to play in it

to win 3-1 that night was great. So we know we can come back against them if we need to. But we want to go out there and play well from the start this time.

“Rosenborg will be more confident but that’s something we just need to deal with. We are a few games further on in our own season, our fitness is better.”

While Celtic are currently on a run of four successive clean sheets, their performance levels have not been consistently convincing. But as they look for improvement after Friday night’s goalless draw at St Mirren, Tierney is not overly concerned.

“It’s hard to say how far we are from our best at the moment,” he said. “A couple of results haven’t gone our way but it’s not the end of the world. It’s still early in the season in the league. Now it’s the first game of the Europa League so there is still everything to play for. We can’t be too hard on ourselves yet.”