Rosenborg interim boss Rini Coolen has accepted his side will have to take risks if they are to rescue their Champions League hopes against Celtic.

Coolen conceded that Celtic were much the better team in the first leg in Glasgow but said he is hoping for an improved performance at home on Wednesday night.

With his side trailing 3-1, he said his side will have to gamble if they are to upset the odds and progress to face AEK Athens in the next round.

He said: "Celtic deserved the win last week and in the end we were lucky that we didn't lose more goals.

"But hopefully we can do some things differently tomorrow. We are playing at home and we have our supporters.

"We have a chance to win the game but we have to create those circumstances and yes we have to take some risks and yes we have to give away some spaces, but we will not open the door.

"We know things happen in football that you don't expect. We have examples in high-level games, Champions League qualification games and in the World Cup.

"Anything can happen in football. Sometimes things happen that you don't expect but realistically, it will not be easy.

"Celtic have a bigger chance to go through than us but it doesn't mean that we don't have a chance at all."

Captain Mike Jensen only has to go back a year for reasons to be optimistic.

After the Norwegian side were knocked out of the penultimate Champions League qualifier last season by Celtic, they were paired with Ajax in their Europa League play-off and beat the previous season's finalists 1-0 in Amsterdam and 3-2 in Trondheim.

The 30-year-old Denmark midfielder said "After we lost to Celtic last year we beat Ajax home and away.

"We were at our best then. It is always small margins and some luck and sometimes you need that.

"It is football, anything can happen and you have to believe in yourself.

"Celtic are big favourites to go through but it is not like we have zero chance.

"It is difficult to put our chances into a percentage but if we play at our best we are a really good team and we have shown that a lot of times.

"But we have to step up from the game we played at Celtic Park."