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The capacity of Saudi Pro clubs to scout widely recognized players in Europe is a challenge. Al Nassr and Al Hilal are the main teams who have introduced prospective European players to the league; these players are enjoying one of their greatest performances and are hitting good targets for their future clubs. Concerning Al Ittihad's recruitment of Karim Benzema, he has yet to demonstrate the same qualities he displayed at the Santiago Bernabéu in the past few decades, as well as having an adverse effect on his new team. Though I would not compare him to Neymar Jr, who is presently out for at least 6 months due to a severe injury received in a national team game.
The two teams you mentioned in the first point are teams that have a long rivalry in this competition. apart from that, these teams have a long history, especially Al Hilal in the last decade. It would be very natural for Al Nassr and Al Hilal to hunt for top European players who really have big names even though they are aged 30+. But so far, Al Nassr is the most generous team in terms of bringing in top European star players. they have Ronaldo and Mane, supported by other players who can still be relied on to compete in this competition. for example, Talisca, Brozovic, Fotana, Otavio. plus, defensive line players Aymiric Laporte and Alex Telles. In other words, this team can be said to be a star-studded team in the Saudi Pro League. It would be very natural, as top European players would be interested in joining Al Nassr.
Unlike Al Hilal, they don't have many big name stars. The only star they have is Neymar, even though he is suffering from injuries. The rest are only players who have played in European competitions with mostly mediocre teams. Even though there is Bono the goalkeeper, Koulibaly, their names are not as big as Neymar, Ronaldo and even Mane.
Nevertheless, this team is solid and strong, with the right selection of players. plus, the coach seems competent so far.
As for Karim Benzema, this team needs new ammunition that is much more competent. for the midfield, Al Ittihad has brought in the right players. But to help Benzema, Al Ittihad inevitably has to have a winger who is ready to use and worthy of being Benzema's partner. One more thing, it would be appropriate if Nuno Santo should be replaced with a coach who has a proven track record, especially one who uses an offensive system. Thus, Benzema can be creative with the remaining skills, talents and abilities that he still has, even with his experience. also, Benzema is an established player.