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It has quite large potential. Because at only 18 years old (currently) he is already at a big club like Real Madrid. And of course Real Madrid has done a lot of research before finally placing their hopes on this young player. Well, I hope he can return to playing on the field. I think whatever minutes he is given that opportunity could be a good start. And yes, he really has to show his best game when he gets the chance. Because competition at a big club like Real Madrid is really quite difficult. Because if the player cannot show his excellence in playing then he must be prepared to sit on the bench more. If only he had not suffered an injury before then perhaps he would have contributed a lot to Real Madrid for a long time.
I can't say Arda is a really good player for Real Madrid as long as he hasn't played a single game with his new club. He is just a talented young player discovered by Real Madrid scouts, but I am sure Arda will not easily break into the main squad if his performances are never better than some of the other experienced midfielders.
Currently Real Madrid has many good midfielders to play with throughout the season, so competition between midfielders will result in young players being left on the bench. Brahim Diaz, Nico Paz, Jude Bellingham are good attacking midfielders for Real Madrid, so Arda Guller will definitely have to work hard to break into the main squad even if only as a substitute.