The Messi–Ronaldo rivalry is a legendary football duel between Argentine Lionel Messi and Portuguese Cristiano Ronaldo, fueled by media and fans, that peaked during their nine seasons facing off for arch-rivals Barcelona and Real Madrid. Together, they are considered two of the greatest players ever, having won a combined 85 official trophies (Messi 48, Ronaldo 37) and being the only players in history to score over 900 career goals each. The debate over who is superior often contrasts Ronaldo's physical power, aerial ability, and scoring across multiple leagues with Messi's unmatched dribbling, playmaking, and creativity, alongside their differing personalities—Ronaldo's fiery temperament versus Messi's reserved nature. Key early clashes included the 2009 UEFA Champions League final, where Messi scored a header in Barcelona's 2–0 win over Ronaldo's Manchester United, and the rivalry intensified after Ronaldo's record £80 million transfer to Real Madrid in 2009. Many commentators felt Messi settled the debate by leading Argentina to victory at the 2022 FIFA World Cup, though others maintain it remains a matter of personal preference and lasting legacy. The rivalry is frequently compared to other iconic sports duels, such as Ali–Frazier in boxing, Prost–Senna in motorsport, and Federer–Nadal in tennis.