Jonathan Rea admitted he had no answer for Chaz Davies' pace in race two but was content to come away from Spain with an impressive 45-point haul while feeling less than 100 percent.

The Northern Irishman was caught out by a rise in track temperature in the second race and had struggled to get rid of a fever throughout the weekend but still battled to first and second place finishes.

Speaking after race two Rea said, "We changed the tyre because the track temperature was higher than 24 [degrees]. I've had no wear with this one all weekend because it wasn't in the working temperature.

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I really had a lack of stability with the rear of the bike. When I saw the pace of Chaz in the beginning I thought that he would surely kill the tyre but he just kept going and going and I was just left to race for second.

We knew when we tested here in winter they [Ducati] were so fast and could keep the lap time low in the cold conditions. We've improved a lot since then. These are the best results I've ever had in Aragon. I haven't been feeling well all weekend so to come away with a one-two...I'm really happy."

Rea's ride to second came just hours after a stirring victory in race one. Having caught and passed Tom Sykes to lead at the mid-way point he then had to contend with a fierce Davies charge on the final lap.

"For sure Chaz was stronger than me in the end today," he said after race one. "I probably spent too many laps relaxing behind Tom to conserve my tyre. I maybe could have gone forward and started making the gap.

I always prefer the hard front tyre compared to other riders. I knew Chaz would make some move on the brakes. I just tried to brake late everywhere so if he had to come past he would run wider, which is what happened in the chicane."

Rea's Sunday performances keep him top of the world championship, 14 points ahead of Leon Haslam.