Tom Sykes has described his two results at Jerez - a win in race one and a fifth in the second outing - as "acceptable" as he lost further ground to Chaz Davies in the fight for second in the World Superbike Championship.

Racing with Pirelli's SC1 front tyre in race one, Sykes was able to open up a sizable margin to ease to his fourth win of the season while team-mate and newly crowned world champion Jonathan Rea struggled aboard the same rubber.

Race two wouldn't provide the similar joy however as Sykes opted for the same front tyre. The warmer temperatures ensured he soon lost grip and despite holding an early advantage over Davies, he faded to fifth at the finish, some ten seconds in arrears of the Ducati man.

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"To get a good start was nice," Sykes said after race one. "To able to manage the race was also nice. First I'm happy. We worked hard all weekend. It's only the time in the race and in morning warm-up that we put the package together as one unit. The race was a little bit of an experiment.

"Me and Marcel (Duinker - Sykes' crew chief) had a good plan. There were two ways to manage the race. We chose a different way to try and see the race performance on the rear tyre. Overall I'm happy. We were able to manage the gap.

"Still, there's work to be done. The over positive thing is that I've never taken a race win here and I did so convincingly in race one. It's been a great day so far for the Kawasaki racing team with Jonathan winning the title. Credit to Kawasaki for the work they've done in the past five or six years that I've been riding for them. I've been struggling all year with the bike, for sure we still have some limitations but we have a test tomorrow. I'll continue working in a good direction."

Along with providing Davies with his fourth win from six races, the second race also saw Kawasaki wrap up the manufacturers title for the first time in World Superbike history.

Although Sykes acknowledged he still has to perfect the current ZX-10R's set-up, he feels the constructors title underlined the fine job done by the Japanese manufacturer in recent years.

"Overall I am fairly satisfied because we have never won at this circuit, so considering the whole season, today is fairly acceptable. We struggled in race two and perhaps chose the wrong front tyre in that race. It was the same as race one and even in race one I did not have a good feeling with the front. But when you win with that margin at a circuit you have never won at before it's is still good. I think if we had changed the front tyre we would have had a much different bike to compete for race distance.

"It is great to be part of Kawasaki winning the Manufacturers' Championship. Obviously the majority of the points have come from Jonathan but I think that over the years I have helped create an environment and package that helped all the riders who have contributed toward Kawasaki's first Manufacturers' title."