Scott Brown is confident Celtic will find the net in Norway on Wednesday night.
The hoops will have to score against Rosenborg or face a penalty shoot out at best to maintain their interest in the Champions League.
A goal-less draw in the first leg and an injury to Leigh Griffiths has posed a huge question mark over Celtic’s chances of repeating last season’s achievement of reaching the group phase.
Brendan Rodgers has tried a couple of systems against Rosenborg and Sunderland without an out and out striker with contrasting results.
The Norwegians are a much more resilient side than Sunderland but the goals of Callum McGregor against Sunderland could be the blueprint to success against Rosenborg.
“Callum did it last season,” Brown told The Sun. “He scored in the big games against Rangers, against Aberdeen.
“He is always there and he is brilliant on the ball. He creates chances and he works so hard off it, so he is a great player to have in your team.
“For him to go down to Sunderland and score a hat-trick shows you that his confidence is flying high.
“It is amazing how he turns with a ball, how he creates chances and peels off.
“He scores goals. Getting a hat-trick against a team like Sunderland was phenomenal.
“We have Tom Rogic, Scott Sinclair, James Forrest, Jonny Hayes in there as well. All these players know where the back of the net is.
“If we have to play six midfielders or Griff is fit it won’t be an issue.”
Celtic fly out to Norway today with all eyes on Griffiths and whether he is fit enough to play after being out since the 2-0 win over Linfield on July 14.