Romain Grosjean admits the start of the season has been a bit of an emotional rollercoaster for him but is keen to see Lotus complete some trouble-free running in Bahrain.

After a poor pre-season, the lack of testing mileage returned to haunt Lotus in Australia as both cars failed to finish the race. While Friday in Malaysia was also tough, Saturday saw both cars run consistently in FP3 and Grosjean made it through in to Q2 before finishing the race in 11th place. Reflecting on the opening races, Grosjean says it has been tough for the whole team but is taking encouragement from the last two days of track running.

"I won't say exactly everything I could say inside my helmet sometimes," Grosjean said. "I think it was good for all the guys that we could finish the Malaysian Grand Prix. Of course it was not the way you would like to see when you start a Grand Prix but at the moment that's where we are plus we were not that far from the points.

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"I think without a small issue at the end of the race, we could probably have got closer and maybe fight for points but it was good and as I said, the guys had three nights in Melbourne when they didn't sleep, all that for not a big reward. And then we went to Malaysia and again, they worked very hard and we all know it's humid and hot there so conditions were tough but we managed to get to the end of the race.

"I think we learned more about our car and we wish from now on that we get trouble-free weekends as was the case on Saturday and Sunday and then from there we can learn, improve and get closer to where we would like to be."

Asked how long he believes it will take Lotus to become fully competitive again, Grosjean replied: "I don't know, to be honest.

"I know that we still have in our genes the winning spirit and we can still fight back. Of course, when you start the season with everything in the right direction it's easier to move forward but at the moment we've had some issues, we've solved most of them, hopefully no more coming, then we can go from there.

"Of course, Renault is well aware that the power unit needs to improve a little bit compared to certain other manufacturers, but I think it's going to be good and we can work on our car."