Eric Boullier has ended the uncertainty about Romain Grosjean's future in formula one. Amid the Frenchman's first-lap troubles this year, culminating in him being branded a "nutcase" by Mark Webber ...

Eric Boullier has ended the uncertainty about Romain Grosjean's future in formula one.

Amid the Frenchman's first-lap troubles this year, culminating in him being branded a "nutcase" by Mark Webber at Suzuka, Lotus boss Boullier and team owner Gerard Lopez had refused to guarantee Grosjean will stay put in 2013.

But, even after admitting he was "nervous" before Sunday's Korean grand prix, the 26-year-old managed to avoid the first corner chaos and finish the race seventh.

"It was good to see Romain drive very sensibly despite all the pressure that is on his shoulders," said Boullier.

He told the BBC: "He (Grosjean) has been reassured about his future and that he is going to stay with us, but I cannot commit today.

"Everything is ready, the contract is ready and has been approved by the board. It is just a question of finding the possibility to do it."

Boullier, who doubles as the head of the group - Gravity - that manages Grosjean, said Lotus continues to believe in the 2011 GP2 champion.

"He deserves to be in formula one, we brought him back because we believe he has a future in formula one. I would be a bit foolish to bring him back and then get rid of him," he said.

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