Sauber has announced one of its drivers for 2013: Nico Hulkenberg. They haven't announced the second driver yet, making Kamui Kobayashi's future more uncertain.
Hulkenberg has won the GP2 Championship in 2009, in 2010 has made his debut with a Williams taking a pole position in Brazil, in 2011 has worked as a test driver for Force India and this year has been Force India's second driver.