Rainier Ehrhardt - Photo Editor
Another possible replacement for Grosjean enters the picture
Romain Grosjean had quite an eventful 2012 season, which left him with the impression that that Formula One is a "world without pity".
Caterham has already announced that Frenchman Charles Pic will drive one of the green cars next season.
Nancy Knapp Schilke, F1 correspondent
Caterham press release