Whether ronaldo performance in manchester today may be influenced by the age factor and also his inappropriate duet?
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I think both have a role in the decline CR7's performance at Manchester United at this time. the age factor, he still seems to have good enough stamina to play 90 minutes. However, the EPL is quite tough, Ronaldo can lose in a body fight with other players when dribbling / grabbing the ball. As for the duet friends, Ronaldo planned to partner with Cavani at the start of the season, but Cavani is also too old, while other players seem to need time to be able to play with Ronaldo style. Ronaldo partner must also have speed so that they can balance each other in the process of attacking the opponent's defense.
But what I see is the age factor that affects Ronaldo's current performance decline because the EPL competition is very tight when compared to young players, of course they will lose and only have strong stamina like you said, about the duet it doesn't affect significantly only It's just that now Ronaldo doesn't hold the ball at his feet for long, maybe because the friction is no longer good and has to work more closely with his duet, and sometimes Ronaldo's duet is still not compatible.
When with Cavani only rely on bait and also his header.