Bayern have spent a reported 36 million euros bringing French midfielder Ribery, 24, from French-side Marseille and Italian striker Toni, 30, from Italian giants Fiorentina in a bid to boost their attack after the 20-times German champions had their worst season for 10 years.

But DFB president Dr Theo Zwanziger insists the arrival of high profile stars like Ribery and Toni, who both played in last year's World Cup final, are a gift to the Bundesliga's profile and will help raise the league's standard.

"For our league, the signings of Ribery and Toni is a gift, the Bundesliga needs international stars," Zwanziger told German paper Bild am Sonntag.

"We will see whether these new signings at Bayern create a boom in interest for the Bundesliga both in Germany and around the world."

Ribery is an uncompromising attacking midfielder, who will fill the role vacated by German captain Michael Ballack's switch to Chelsea, and will play alongside German international Bastian Schweinsteiger, 22.

Likewise, Toni will be competing for a place with, or play alongside, German international Lukas Podolski, 22, voted the best young player at last year's World Cup, and Zwanziger says the onus is on the German youngsters to raise their game.

"It's a challenge for our younger players like Bastian Schweinsteiger and Lukas Podolski," said Zwanziger.

"The youngsters will have to raise their standards if they want to continue at the top level of world football.

"They can ill afford to rest on their laurels.

"The arrival of players like Ribery and Toni can only help Bayern's youngsters."

Having finished fourth in the Bundesliga and missed out on a place in the Champions League for the first time in 11 years, Bayern have made six signings including Ribery, Toni and 21-year-old German defender Marcell Jansen.

After the biggest spending spree in Bayern's history, coach Ottmar Hitzfeld will also have striker Jan Schlaudraff, plus midfielders Turkey's Hamit Altintop and Argentinian Jose Ernesto Sosa with more expected to join.

Brazilian winger Ze Roberto is set to return after a year with Santos FC and Miroslav Klose, the top-scorer at last year's World Cup, could also be tempted to Munich from Werder Bremen.