Eddie Howe's side have dropped to the bottom of their group after back-to-back defeats to their German opponents.
Newcastle were cruising at the top of the group after two matchdays but have been brought straight back down to earth with those successive defeats.
Newcastle's course have not been helped with an ever-growing injury list and they travel to the Parc Des Princes to face Paris Saint Germain next before hosting AC Milan in their final match.
Trippier, who swiftly turned his attention to Saturday’s Premier League trip to Bournemouth, said: “When I was at Tottenham, we had Barcelona and Inter Milan in our group and everyone said it was done, but never say never.
“We got to the final that year, so it is a never-say-die attitude from us. We can’t control what happens, we just have to focus on Bournemouth and forget this.”
“Everybody has to stand up. There are always going to be injuries in football.
“The good thing about us is that as a team and a manager, we don’t make excuses. Everybody feels valued in this team and we have a strong bond as a team.
“The reality is we are missing a lot of key players. But you look at Manchester United away and Arsenal at home and we’ve got good results, so there are no excuses from us. Whatever team the manager picks, we give everything.”
