Romain Grosjean says he is sure he will still be with Lotus for the 2013 F1 season although he is unsure when his future will be confirmed.

Lotus revealed earlier this week that Kimi Raikkonen is to be retained for next year although no mention was made about Grosjean, who has impressed with his speed this year but has also found himself involved in numerous incidents on track.

However, Grosjean said he was sure he would be with Lotus again next season and would wait for the decision to be taken by team bosses.

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"With the team we're happy together, they've put a lot of confidence and faith in me during a hard time," he was quoted by the Press Association. "I'm showing them I'm working and improving and trying to sort out all the problems, whilst keeping my speed. But there is no reason that it goes bad for the future.

"I've no idea [when his future will be confirmed], to be honest. Eric Boullier is better placed than me to answer that."

Boullier was quoted recently as saying that Grosjean has shown he deserved his place on the F1 grid, although the team is believed to be still monitoring his driving after incidents such as the one at Spa which saw him pick up a one race ban.