Lionel Messi and Cristiano Ronaldo's most memorable clashes - ESPN
Comparing Cristiano Ronaldo and Lionel Messi's stats after turning 30
Cristiano Ronaldo vs. Lionel Messi: Career trophies, goals, stats and awards for football superstars
Ronaldo tops Messi with two goals in Juventus win over Barcelona
Cristiano Ronaldo vs Lionel Messi: Man Utd and PSG stars' head to head record ahead of Champions League showdown – The Sun
Ballon d'Or: Lionel Messi vs. Cristiano Ronaldo - Battle of the brands
Messi vs Ronaldo - Who is better, Messi or Ronaldo? Lionel Messi vs Cristiano Ronaldo Stats
Lionel Messi v Cristiano Ronaldo: Key battle in Barcelona v Real Madrid, Football News
The Saudi Exhibition Game That Turned Into Messi and Ronaldo's Final Showdown - WSJ
Messi–Ronaldo rivalry - Wikipedia
El Clasico' - Messi vs C.Ronaldo - FootyRoom
Messi Vs Ronaldo: Head-To-Head History, Records And Stats
The records that Cristiano Ronaldo and Messi can still break
Lionel Messi vs Cristiano Ronaldo: Records, goals and trophies won compared - Mirror Online
Real Madrid v Barcelona: Five key battles that could decide El Clasico on the Bernabeu pitch including Cristiano Ronaldo v Lionel Messi, Luka Modric v Andres Iniesta and Gareth Bale v Jordi