Former Real Madrid and Brazil striker Ronaldo would like to see Philippe Coutinho leave Liverpool for the Bernabeu.
Ronaldo spent five seasons in the Spanish capital, scoring 104 goals in 177 appearances for Real and winning two La Liga titles.
The former Inter Milan forward said Coutinho, who has emerged as a key player for Liverpool since signing from Inter in 2013, should test himself in Spain.
"I would love to see Coutinho at Real Madrid," Ronaldo told Spanish radio station Onda Cero.
"Spanish football is, without doubt, the best in history. It has always bought the best [players] and produced the most beautiful football."
Ronaldo also gave his verdict on the world's best players, suggesting Barcelona forward Luis Suarez deserves to be in the conversation.
Suarez, who top scored in La Liga with 40 goals last season, has scored six in his first eight league appearances so far this campaign, more than Lionel Messi, Neymar and Cristiano Ronaldo.
"Between Cristiano, Messi or Neymar, I would also include Luis Suarez," Ronaldo added.
"I choose Cristiano Ronaldo because he is a Real Madrid player, but we cannot forget how good Messi and Neymar are."