You can't vehemently say that there will be no possible chance of Alisson moving to the Saudi league even though we know he's important to Liverpool but saying that only an offer from Real Madrid will only persuade him to move out may not really be true because Saudi Arabia teams offers European players mouthwatering amount to come to their league and considering that most players now are after the money they will make in the Saudi league he can agree to go there. However, there are still other world class players in the Saudi league so if they had same reasoning they wouldn't have been there.