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Belgium boss Roberto Martinez says Cristiano Ronaldo has two big problems at Manchester United.

Speaking on Amazon Prime, Martinez said: “Cristiano Ronaldo is an iconic player and when the Ballon d’Or list came out he was still the highest player from Manchester United.

“He has two problems: one is that he is 37 so when he has a bad game, it is because he is ‘too old’ and it’s almost like he is not allowed to play a bad game. The problem this year is that you can have five substitutes.

“Ronaldo comes from an era that, when you are not playing 90 minutes, it was seen as a negative.

“Now we are seeing attacking players not playing 90 minutes regularly, maybe 20 or 30 minutes because of the intensity and the demands of the Premier League.”