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Romain Grosjean will be hit with a five-place grid penalty for the United States Grand Prix thanks to a gearbox change.

Grosjean's Lotus hit gearbox trouble during Saturday morning's one-hour free practice session, losing fourth gear and forcing the team to fit a replacement unit before qualifying.

It is the second time that Grosjean has had to serve a penalty for changing his gearbox, the first coming in July's German Grand Prix.

The Frenchman had finished Friday practice at Austin in 13th position, two places behind team-mate Kimi Raikkonen, winner of the previous race in Abu Dhabi.