Because they compete across multiple sports, this guide breaks down their rivalry across both major disciplines, including their recent matchups in the 2025–26 UEFA Champions League and the EuroLeague . ⚽ Football: UEFA Champions League
While they do not play each other regularly, their European ties are always massive spectacles. Recent Encounter Olympiakos - Barcelona
: Midfielder Fermín López netted a hat-trick and Marcus Rashford scored a brace to spearhead Hansi Flick's offense. Ayoub El Kaabi scored the lone penalty for the Greek side after Santiago Hezze was sent off with a red card. Tactical Breakdown Because they compete across multiple sports, this guide