Esteban Gutierrez not worried about future despite Sergey Sirotkin joining Sauber
17-year-old is the son of one of the Swiss team's new investors
Thursday 25 July 2013 15:27, UK
Esteban Gutierrez claims he has no concerns about his own future after it was revealed Sergey Sirotkin will drive for Sauber in 2014, subject to the Russian youngster obtaining the necessary super-licence.
