Jarno Trulli was left frustrated by the opening day of the second pre-season F1 test of the year at Jerez after Team Lotus hit a number of problems with the new T128.

The Italian was sidelined for much of the afternoon as the team worked on a problem with the car, which prevented him from pushing for a quick time. However, despite the frustration of lost track time, Trulli insists that his impressions of the car remain positive.

"The car does feel pretty good, but the problem this afternoon limited our total time on track," he said. "Despite that we are still where we want to be - close to the midfield and in a car that we still have a lot more to add to.

"I think there is still a lot more to come from the car so I'm very positive and looking forward to getting back to work tomorrow."

Sporting director Dieter Gass admitted it has been a mixed day for the team and said work would be ongoing overnight to fix the issue on the car.

"We started the day well and had a good morning session," he said. "For the first time we were able to do meaningful setup work and start being able to understand the aerodynamics of the car.

"Unfortunately we had a small problem this afternoon which limited our running, but the team worked well to rectify it and we managed to give Jarno another 45 minutes at the end of the session. We will take another look at the problem tonight and will make sure it does not affect us tomorrow."

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