...if you watch Ronald you see it's performance in Manchester united has obviously change because you won't understand, the age of footballers add more meaning and their performance in football, so Salah what make the performance to reduce is age..this is a personal suggestion
But looking at Ronaldo, you can't say that he has become worse. Yes, he is scoring fewer goals, but his movements on the field are exactly the same as before. So we can conclude that his eyesight has deteriorated and that's why he shoots past the goal? Or he can't see his partners? Obviously not. It's more the same luck, but it's not related to age.
Exactly, actually there are some factors why Ronaldo's performance seems like decreasing in Man United this season (not the previous one, because he was the top scorer the previous season). I am sure that although he is older enough, his ability and skills, also his power are still strong enough. The combination of the skill may be better than that several players in the club. But this season, the strategy of the coach is very different from the previous one. Ronaldo doesn't become the main player to set in the first line up. The chance to make a goal is also very small becuase he seems not given more chances to score from otherplayers in the squad.