Castrol Honda suffered for having just a single rider on the World Superbike grid at Motorland Aragon as Ruben Xaus failed to score in either race.

With lead rider Jonathan Rea forced onto the sidelines following his accident at Misano, the proximity to the next event in Spain forced Castrol Honda to persevere with just Xaus at Motorland Aragon.

However, despite racing on home soil, Xaus failed to make it through to Superpole before hitting problems in both races that left him outside the top fifteen.

"It's been incredibly difficult this weekend, which is, of course, very disappointing for the team and especially for me as I wanted to put on a good performance for all my family, friends and fans who have some to support me here this weekend," the former WSBK runner-up said.

"There has not really been one individual issue this weekend - more a combination of different problems and I can only say that we'll work tirelessly to start and finish at Brno in a better way than we were able to here."

A dismal weekend for team manager Ronald ten Kate, Honda is now a point behind Suzuki in the manufacturer's standings, despite its Japanese rival having just a single full-time rider, while Kawasaki has also drawn level on points.

"Ruben has had a number of set-up problems at Aragon, which were not helped by our winter test here yielding no useful data whatsoever, because it was so cold. Apart from the dramatic change in weather conditions, we need to look at the issues that have affected his performance here and we will focus strongly on those between now and the next round at Brno, where things can only get better.

With Rea expected to miss the next round in three weeks' time, Castrol Honda is currently discussing options for his replacement at Brno.