UPDATE 1-Motor racing-Gutierrez completes Sauber 2014 line-up
December 21, 2013 at 04:40 AM EST
LONDON, Dec 21 (Reuters) - Mexican Esteban Gutierrez will race with Swiss-based Sauber for a second season next year with Russian teenager Sergey Sirotkin signed as test driver, the Formula One team announced on Saturday.
