Esteban Gutierrez, and his Telmex backing, are staying at Sauber in 2014.
With Adrian Sutil already signed, the news completes the Swiss team's driver lineup for next year, even though it was earlier believed Russian Sergey Sirotkin was a key part of a crucial investment deal.
Instead, 18-year-old rookie Sirotkin will be a test driver in 2014, Sauber announced.
"Now we will continue to support him, including obtaining his super license," team boss Monisha Kaltenborn said. "Our goal remains to prepare him for a debut in formula one."
Sauber's announcements on Saturday mean that the only race cockpit vacancies on the 2014 grid are now with Marussia (one seat) and Caterham...
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