Correcting the information, Al-Nassr had 8 friendly matches, and from these 8 matches Al-Nassr got 4 defeats, 3 draws and 1 win. They only won when they faced Maritimo (a team from the Portuguese league), the rest of the results they got were not good. From these results, it looks like they're not ready to face teams from Europe, they're only great domestically, but when they go against European teams they can't do more. The important point is the final sentence you said, this is just a pre-season match, it can't be used as a real reference.
The real season hasnt even kicked off yet. Thats when you witness the actual output of a team. They have skill; Ronaldo is the best. It is now about combining everything.
These early games? Educational opportunities. They will work out what works and what doesnt. Come the regular season; they will be an other beast.