Pep Guardiola’s side would have been among the favourites to win the competition outright before a ball was kicked this season but are sat 24th in the Champions League table heading into tonight’s huge clash at Paris Saint-Germain.

Much has changed in this season's Champions League, the knockout play-off phase being one major new introduction

It's been a journey into the unknown, but the new-look Champions League is finally reaching the climax of the league phase. Here's what's needed to go through.