Daniel Ricciardo says Red Bull hasn't shown the true pace of the RB11 yet, after the team focused on high fuel runs on the third day of the final Formula 1 pre-season test in Barcelona.

The Australian driver notched up 128 laps, with a quickest time of 1m 25.742s, which placed the Red Bull driver at the bottom of Saturday's timesheets. Ricciardo isn't concerned about this as the team is yet to seriously test the performance of its car on a fast low fuel run.

"I don't think we've shown our true pace yet on low fuel but on the high fuel stuff we are a bit happier than where we felt we would be," Ricciardo said. "We will see come Melbourne but we definitely are more competitive on higher fuel. We don't know too much on the low fuel runs with the soft and supersoft tyres as we didn't give it a run"

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"I think we've got a lot of potential and have a few little bits which are a step in the right direction, moving away from some of our weaknesses. And with Renault we are getting there, still some gains to be made, but we are getting there.

"I haven't seen too much of what everyone else has done but we had some good 12 to 15 lap stints which stayed within a second of so of the lap times. I think there are definitely some positives to take from today."

Ricciardo also says the Mercedes pace was expected and his task is to try a reel them back in a similar manner to last season when he was the only non-Mercedes driver to claim victory in Formula 1 with three wins.

"We know Mercedes are quick but Ferrari and Williams also look good too," he added. "Qualifying and racing is where we can find out where we really stand. It's clear that Mercedes are strong but for the rest is a question mark."

Ricciardo will spend the final day of testing in the RB11 and is aiming for another productive day of refining the car to be ready to race in Melbourne in two weeks' time.

"I think today has been progress which is all you can ask for in testing," he explained. "In Jerez we still had some new car problems, as you do, but in Barcelona it ran much smoother. Today we did 130-odd laps and all going well tomorrow another 120-130 laps.

"We're looking better than last year and finding some real strengths. But with testing it is all about fine tuning which will hopefully come a bit from the car and a bit from Renault."