The Barcelona star isn't expected to return to action until February.
"Messi has been playing a huge amount of games for five years, and has been the biggest star in the world of football. Now with this injury, which is not that serious but is making him miss lots of games, maybe he is getting some rest so he can recharge his batteries," Ronaldo said.
On the Ballon d'Or, Ronaldo delivered a snub to Cristiano Ronaldo: "I think that Messi will win it again."
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