Frank, visibly pained yet proud, admitted they had the game in their grip before it all unravelled.
"I think we played a very good game against one of the best teams in the world, maybe the best," Frank told TNT Sports. "We had them exactly where we wanted them for 80-somethimg minutes until 2-1. Then it shifted the momentum but I'm so proud of the team, players, club and fans. We showed we can be adaptable and pragmatic.
"We needed to be that against a team like PSG, with the way we wanted to defend with both high pressure and a low block. The first half was almost perfect and the set-pieces were very dangerous. In one game, I think we have shown we can play against any team in the world. I'm not in doubt about that and that's a positive to take away from this."