Low: Germany's youngsters must be good enough to beat Messi and Ronaldo

Amid the clamour for the Bundesliga's exciting young talent to feature for Germany, Joachim Low has offered a reminder of the quality required to mount a successful defence of the World Cup.

There has been speculation that Low could pick an experimental squad for the Confederations Cup in June and July, which serves as a warm-up tournament for the World Cup in Russia next year.

Germany will be seeking to retain the crown they earned in Brazil in 2014 and Low has plenty of promising newcomers vying for selection alongside an experienced core of established players.

But the national team coach claimed he will not be easily swayed by the calls for new faces.

"There are not quite as many [who are ready] as we always think," he told Kicker.

"We're talking about [beating] Messi and Ronaldo for Germany to become world champions. 

"If someone in the Bundesliga performs well, that does not mean that he will perform well in World Cup knockout games, which the team needs to win the title. 

"We speak of world class, of absolute world class."

Germany are up against Australia, Chile and Cameroon in Group B of the Confederations Cup.