As the UEFA Champions League advances into the Round of 16, the spotlight often gravitates toward traditional powerhouses like Real Madrid, Barcelona, and Liverpool. However, this season features several underdog teams poised to challenge the established order.

Away goals were removed from UEFA competitions in June 2021, with the new rule taking effect from the 2021/22 campaign. The rule change was made as a result of recommendations from the UEFA Club Competitions Committee and the UEFA Women's Football Committee. Two-legged ties that finish as a draw are now decided by extra time.

How does it work?Thirty-six sides entered into the new "league phase," and now there are 16 remaining following an exciting playoff round that saw Manchester City bounced by Real Madrid and Celtic put a scare into Bayern Munich.