The plethora of German drivers is making it harder for Nico Hulkenberg to break through in Formula One.

That is the claim of famous driver manager Willi Weber, who after watching his rookie charge Hulkenberg secure pole in Brazil last year was left scrambling to find the 23-year-old a new job.

Struggling Williams replaced Hulkenberg with the well-financed Pastor Maldonado, with Hulkenberg forced to sit out 2011 as Force India's reserve and Friday driver.

There were seven Germans in F1 last year, but only five for the 2011 season as Hulkenberg and Nick Heidfeld lose their race seats.

"Nico has all the right qualities but he had to share the stage with many other Germans," Weber told the Swiss publication Motorsport Aktuell.

"It's like a cake; if you have to share it with seven others, the piece you have is small," he explained.

Both Hulkenberg and Heidfeld are considered serious contenders to replace the injured Robert Kubica at Renault this year.