Manchester United remain the only club in Champions League history to win the competition unbeaten on two separate occasions, while Arsenal have become the first team to reach the final undefeated twice and still fail to lift the trophy.
The contrasting records have drawn fresh attention following Arsenal’s penalty shootout defeat in the 2025/26 Champions League final.
United first achieved the feat during their famous treble-winning campaign in 1998/99.
Sir Alex Ferguson’s side came through a group containing Bayern Munich and Barcelona without suffering a defeat before completing a dramatic 2-1 comeback victory over Bayern in the final.
The English giants repeated the achievement in 2007/2008, winning the competition unbeaten once again.
Led by Cristiano Ronaldo, Wayne Rooney, and Carlos Tevez, United won nine matches and drew four before defeating Chelsea on penalties in the Moscow final.
The success formed part of a record 25-match unbeaten run in the competition, stretching into the following season.
While several clubs have won the European Cup or Champions League without losing a match, none have matched United’s achievement of doing so twice in the modern era.
Liverpool, Ajax, and AC Milan also completed multiple unbeaten title-winning campaigns, while Real Madrid, Manchester City, and Bayern Munich are among the other clubs to have conquered Europe without defeat.
Bayern’s 2019/20 triumph remains unique as the only campaign in which a team won every match en route to the title.
For Arsenal, the story has been very different.
The Gunners first reached the Champions League final unbeaten in 2005/06 under Arsene Wenger.
That side eliminated Real Madrid, Juventus, and Villarreal while setting a competition record of 10 consecutive clean sheets and 995 minutes without conceding a goal.
However, despite taking the lead through Sol Campbell, Arsenal lost 1-2 to Barcelona after goalkeeper Jens Lehmann’s early red card.
Two decades later, history repeated itself.
Mikel Arteta’s side navigated an unbeaten path to the 2025/26 final, overcoming Bayern Munich, Inter Milan, and Atletico Madrid.
Arsenal led the final through Kai Havertz before Paris Saint-Germain equalised through Ousmane Dembele.
After 120 minutes failed to separate both sides, PSG prevailed 4-3 in the penalty shootout.
Unlike the previous unbeaten run under Wenger, which ended in defeat during normal time, Arsenal’s latest heartbreak came after extra time and penalties.
The result also extended Arsenal’s wait for a first European Cup triumph and left them with the unwanted distinction of being the only club to reach two Champions League finals unbeaten and lose both.
While Arsenal continue their search for European glory, Manchester United’s achievement remains unmatched, underlining the scale of one of the competition’s most remarkable records.
