Lotus were forced to finish a pre-season testing session in Barcelona early due to a chassis problem this morning.

Romain Grosjean managed to complete just seven laps at the Circuit de Catalunya before he was forced to retire back to the garage.

"We completed a few aero runs and then started timed runs, but I was very quickly aware that the car wasn't responding as it should," Grosjean said.

"It's not ideal to lose track time, but fortunately we will have the chassis which ran perfectly in Jerez so I should get some good track time tomorrow."

The chassis has now been sent back to the team's base in Enstone for further checks.