european star players who are quite old certainly not be a problem, the most important thing is that their performance is still a bit the same as when they were young and for Ronaldo, who thinks he has almost the same performance when he was young, its just that his ball control skills are definitely slightly reduced due to age it will definitely have a little influence and in fact Ronaldo is still known as scoring machine as you said, even like Benzema and Neymar who are also in one of the SPL teams at the moment are not able to perform optimally because they need time to adapt and well I hope that European players who have the age a bit old will still shine in this SPL.
Actually Karim Benzema and Neymar are first season with Saudi Pro League teams and they need time for adapting about weather where difference condition between Europe and Saudi Arabia, its they can adapting well not close opportunity to make compete with Cristiano Ronaldo in top scorer standings position. Its not really bad with Karim Benzema performance in this season, from 6 matches in domestic league he has contribution with 3 goals and 2 assists. Just waiting moment only for Karim Benzema lead top scorer from Cristiano Ronaldo have adapted well with Saudi Arabia weather after second season played for Al Nassr. Not depending with Karim Benzema and Neymar more younger than Cristiano Ronaldo but depend on how long with Ronaldo have played in Saudi Pro League than Karim Benzema and Neymar as their first season with Saudi Arabia club.