Bayern Munich's honourary president Uli Hoeness admits the big spending of Saudi Arabian clubs has him "very worried".
Al Ittihad have just swooped for Real Madrid striker Karim Benzema after Al Nassr's signing of Cristiano Ronaldo in January.
Hoeness said: "I am very worried about what is coming from Saudi Arabia.
"They seem to have endless money. We pay for it through our oil prices, but complaining is pointless. We have to find other methods to deal with it.
"It will certainly not be easy in the next ten years. You can see it with golf, where they bought everything. But the advantage is that they can only play with eleven players, and a team can only have 15-16 players. So there will always be more than 50-60 good players in the world, and we have to reach them."