Lionel Messi must emulate Cristiano Ronaldo to steer Barcelona through in Champions League
Is 'Ronaldo vs Messi' the greatest rivalry in the history of sports? - Quora
Messi vs. Ronaldo: The Greatest Rivalry in Football History (Paperback)
The Great Debate: Who is the Better Player, Ronaldo or Messi? - The Observer
Cristiano Ronaldo - Wikipedia
Cristiano Ronaldo, Lionel Messi's rivalry drives each other to ever-greater heights
Messi, Ronaldo to make their final showdown at Qatar 2022
Lionel Messi and Cristiano Ronaldo's most memorable clashes - ESPN
Messi scores free-kick landmark goal and edges