Barcelona vs Man Utd head-to-head record
Lionel Messi vs Cristiano Ronaldo: Champions League records compared
Key Clasico battles - Eurosport
Messi vs Ronaldo - Who is better, Messi or Ronaldo? Lionel Messi vs Cristiano Ronaldo Stats
Cristiano Ronaldo vs Lionel Messi: Man Utd and PSG stars' head to head record ahead of Champions League showdown – The US Sun
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Cristiano Ronaldo vs Lionel Messi: historical head-to-head record - AS USA
UCL Stats: Ronaldo record 41 and 178, Messi record 7 and 27 - ESPN