Strikers worth big money: Ronaldo
Cristiano Ronaldo has claimed he "doesn't agree" with centre-backs and goalkeepers being sold for "€70 or €80m" and believes a player who scores goals is worth "three, four times more, easy".
The Juventus forward, who became the world's most expensive player when he left Manchester United to join Real Madrid for £80m in 2009, believes inflation is causing clubs to gamble on players before they've proved their worth.
The five-time Ballon d'Or winner specifically mentioned the price of defenders and goalkeepers with Harry Maguire's £80m move to United from Leicester this summer breaking the world record fee paid for a defender.
Ajax's 19-year-old captain Matthijs de Ligt became Ronaldo's team-mate at Juventus this summer, joining for £67.5m after protracted negotiations with a number of Europe's top sides.
"It's difficult to make calculations in modern football," Ronaldo said.
"(Clubs) gamble a lot on potential and the football industry is different.
"Leaving the case of Joao Felix to the side, any player can go for €100m, even without showing anything. There is more money in football.
"A centre back and a goalkeeper can go for €70m or €80m," he added.
"I don't agree (with it) but it's the world that we live in and you have to respect it."
"When I see goalkeepers selling for €75m, a player who does what I do on the pitch and who scores goals is worth three, four times more, easy," he declared.