Al Nassr star Cristiano Ronaldo is full of praise for Portugal teammate Joao Felix.
The Atletico Madrid striker is being linked with Newcastle and Aston Villa after a six month spell with Chelsea.
"Can he [Felix] repeat my successes in Spain? I believe that a lot because he is an excellent player with a lot of potential who can evolve," he told Mundo Deportivo.
"You can see the same with Bernardo [Silva], although he is already much more mature in this regard. It is difficult to make calculations in current football.
"You bet a lot on the potential, and the football industry is different. Leaving aside the case of Joao Felix, any player is worth 90m, even without having proven anything.
"There is more money in football. A central defender and a goalkeeper can be worth 60m to 70m. I don't agree, but this is the world we live in, and we have to respect it."