ROSENBORG hero Nicklas Bendtner has warned Celtic they know all about them and are gunning for revenge.

The Norwegian champions needed a controversial penalty deep into injury time converted by the former Arsenal striker to squeeze past Icelandic side Valur 3-2 on aggregate.

That sets them up with a Champions League second qualifying round rematch against the Hoops with Brendan Rodgers' side needing a late strike from James Forrest in Trondheim last year to seal a 1-0 aggregate win, after a goalless draw in Glasgow.

Read more: Celtic manager Brendan Rodgers considering Dedryck Boyata recall for Rosenborg qualifier

The Double Treble winners easily saw off Alashkert with another 3-0 win, adding to their success in Armenia by the same score.

But Bendtner can't wait to get another crack at the Scottish champions.

He said: "We would rather be playing Celtic, instead of a Europa League trip to Andorra which we would have got had we not scored the third goal.

"It will be interesting. We met them last year. We have to prepare for next week and then see what's going on. We have not looked at them yet. 

"I think it will be a different match than last year. To be honest, we know how they play.

"And we know they are a massive club who are extremely consistent in getting to the Group Stage.

"We will have to prepare ourselves well and look for a different outcome.

"For me scoring that late penalty, I knew what was at stake. Both sides were nervous in stages.

"They said our penalty was fortunate, but we have been cheated many times in our league by bad decisions, so I think we deserve some fortune."

And Rosenborg boss Kare Ingebrigtsen is also relishing a rematch with Celtic.

He said: "I don't think Celtic have radically changed the way the play or the players they have so we are not going into the unknown when we play them.

"We know it's extremely difficult to beat a team like Celtic, but we have the opportunity at least.

"We think we can do it.

"Last year was a massive disappointment to go out like that to Celtic. Hopefully, it will turn out better now."