Nico Hulkenberg says Sergey Sirotkin moving into F1 in 2014 'risky'
|By Jonathan Noble and Matt Beer||Monday, August 19th 2013, 10:07 GMT|
Sauber's Nico Hulkenberg believes it is 'risky' to think that the team's new teenage protege Sergey Sirotkin will be ready for a Formula 1 race seat next year
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