By ESPNSTAR.com staff
The Frenchman had a decent season as he finished in eighth position and secured three podium finishes. However, he was also involved in a number of racing incidents and, perhaps most infamously, was responsible for causing a turn 1 pile-up in this year's Belgian Grand Prix.
Grosjean was slapped with a one-race ban following the incident - the first race ban given to a driver in 18 years. The incident also saw the early retirements of Fernando Alonso, Sergio Perez, Lewis Hamilton and Pastor Maldonado.
Therefore, it is doubtful if he will get a chance to partner Kimi Raikkonen for the forthcoming season as the Enstone-based marque are reportedly considering other candidates. Recent reports have seen the likes of Kamui Kobayashi and Heikki Kovalainen linked instead for the seat.
When asked if Grosjean felt that F1 was a harsh and exacting sport, the 26-year-old told Swiss daily Le Matin: "Yes, [it is] a world without pity. But that's normal for the top level."
"It's also the case with banking and watchmaking. There is no room for mercy.
"Seats in F1 are scarce; there are no presents."
Grosjean, though, is not allowing himself to become too downhearted as he feels that he learnt a great deal during the 12 races when he did get to cross the chequered flag.
"[I learnt] a lot. More than what I thought [possible].
"The world of F1 is more difficult than I imagined. When I returned, I saw that there was a mountain to climb.
"And once I started to climb, I saw how high it really is."
Kobayashi, who has been replaced at Sauber by Esteban Gutierrez, has already setup an online donation service and has received €775,000 from his fans and well-wishers. The funds are slated to be given to his employer for the 2013 season if he remains an active member of the circuit but will be returned to the fans if he fails to secure a spot.
The Japanese is thrilled at the level of support shown by fans all across the world as he told AFP News: "It has been a huge show of support after a campaign of only five days."
Caterham, Force India and Marussia also have to finalise their driver line-ups although they have already secured their lead driver.