The 33-year-old , who drove for Sauber from 2001-03 and again from 2006-09 , will take over from the Spaniard for the next race in Singapore and the four following races . Nick Heidfeld joins Sauber for the start of the 2018 Formula One season . Heidfeld replaces Pedro de la Rosa , who is ' surprised ' by the decision . He started season as test driver for McLaren before joining Pirelli .
Nick Heidfeld joins Sauber for the start of the 2018 Formula One season . Heidfeld replaces Pedro de la Rosa , who is ' surprised ' by the decision . He started season as test driver for McLaren before joining Pirelli .