The Scottish Premiership giants failed to progress to the group stage of the Champions League this campaign.
The Bhoys also suffered a setback in the Europa League, as they could not get past the group stage.
Celtic are one of the biggest clubs in the world and have a massive fanbase. Failure in Europe under manager Ronny Deila has been hard to bear for the Hoops supporters, who must be frustrated at the team’s struggles outside of Scotland.
Norway international midfielder Johansen has pinpointed a reason why Celtic have struggled to succeed in Europe.
"We obviously need to try more - we look a bit afraid when it comes to the pressure," the 24-year-old told BBC Scotland. "Hopefully we can get that off our shoulders and play better next year.”
Johansen made the comments following Celtic’s 1-1 draw with Turkish giants Fenerbahce in the Europa League Group A on Thursday evening.
The result means that the Glasgow outfit have finished bottom of the group with just three points from six matches.