Romain Grosjean has 'learned his lesson' - Boullier

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F1: Crashes dog Lotus's Romain Grosjean

Lotus team principal Eric Boullier believes Romain Grosjean has learned an important lesson after being forced to sit out the Italian Grand Prix.

The Frenchman, 26, was given a one-race ban for causing a pile-up at the Belgium race a week before.

Consequently, he had to watch on as reserve driver, Belgium's Jerome D'Ambrosio, took his place at Monza.

"He has definitely learned his lessons and I know he is eager to get back in the car in Singapore," said Boullier.

"He will have learned a lot because being in your car you have only one radio in your head.

"When you are sitting in the garage and you have both cars then you can learn much more."

It was a better weekend for Grosjean's team-mate Kimi Raikkonen, who claimed fifth.

The Finn is now third in the drivers' standings, one point behind second-placed Lewis Hamilton and 38 adrift of championship leader Fernando Alonso.

Asked whether Raikkonen, still to win a race this year, was taking the title by stealth, Boullier said: "It's good for us, good for Kimi.

"The approach he has is good. The more we can deliver big points, and if we can maintain our consistency, that is going to be key for the championship.

"We have said this since the beginning [of the season] and he is confirming that now.

"So we look forward to the next races because they should suit our car much better."