Ozil first rose to prominence at the 2010 World Cup, where his outstanding performances helped Germany to a third-place finish in South Africa.
His vision and skill on the ball prompted Real to fork out a reported €15million last summer to procure his services from Werder Bremen, and he fitted in seamlessly at the Santiago Bernabeu, even keeping out Brazilian playmaker Kaka from the starting eleven.
And having been handed the number ten jersey for the new season, Ozil is expected to once again play a prominent role for Los Blancos, something Ronaldo is pleased about.
"Mesut is a great player and it is good fun to play alongside him," Ronaldo told Sport 1.
"He is currently the best German player."
Ozil is not the only German of Turkish ethnicity presently at the club, after Real signed former Borussia Dortmund playmaker Nuri Sahin earlier this summer for a fee of €10million.
And while Sahin is yet to make his Real debut after an injury-plagued pre-season, Ronaldo fully expects the Turkish international to make an impact for Los Blancos this term.
"I knew Sahin before he arrived here because there has been plenty of talk about his qualities.
"I hope he can be back soon and help the team."
Ronaldo also believes the impact players like Ozil and former Stuttgart midfielder Sami Khedira have made at Real is testament to the quality of German football, and rates the Bundesliga even higher than the Italian Serie A.
"The German league has always maintained a very high level.
"There are many good players who play in Germany.
"Apart from England and Spain, the German Bundesliga is certainly the strongest."
Following the international round of matches, Real resume their La Liga campaign against Getafe on Saturday, before kicking off their quest for the UEFA Champions League on Wednesday away to Dinamo Zagreb.