Cristiano Ronaldo's move to join Al Nassr is proof of Saudi Arabia's ambition to improve as a football nation, says Real Madrid goalkeeper Thibaut Courtois.

Portugal superstar Ronaldo had his contract with Manchester United terminated by mutual consent shortly before his country's World Cup opener, leaving him free to make a lucrative move to the Saudi Pro League.

The transfer marks the end of an illustrious career for Ronaldo in Europe, where he lifted the Champions League on five occasions and won the Ballon D'Or on five occasions.

With Ronaldo having reportedly attracted the interest of clubs in Europe and MLS, Courtois believes the addition is a statement of intent from Saudi Arabian football.

"The transfer of Cristiano makes it clear that the country wants to improve in sports," Courtois told reporters.

"Cristiano choosing to come here is his decision, but it shows that Arabia wants to improve. They've brought him in to win the league."

Madrid boss Carlo Ancelotti had a similar view of the deal, saying: "Cristiano has been a fantastic signing. We wish him well. He's a legend of our club, like [Gareth] Bale, who retired yesterday. They remain in the hearts of all Madridistas."

Madrid are in Saudi Arabia for the Supercopa de Espana, where they face Valencia in the semi-finals on Wednesday, and Ancelotti wants to use the competition as a benchmark for success in the remainder of the campaign.

"Titles are always important for this club. Last year gave us a lot of confidence for that season. Hopefully, the same thing will happen this year," he added.

"We have to fight for all the titles. We have one very close to try to win it. The goal is the Super Cup, for now."