An eleventh win of the season means Ben Spies is now within touching distance of the World Superbike Championship lead, despite riding with a 'tweaked knee' following his contact with Michel Fabrizio.

Spies could have moved into the lead of the overall standings for the first time had he completed the opening race of the weekend, the American having been collected by Fabrizio when the Italian misjudged his passing manoeuvre.

Sending him barrelling out of the race, although Spies was visibly upset with Fabrizio as the Italian attempted to apologise, he would put it down to a racing incident.

"It was not the best move in the world, but that's how racing goes sometimes," he said. "Michel was trying to apologize to me after the crash and I didn't want to hear it. I was trying to tell him to use his head. Obviously I was not happy at the time."

However, while Spies did require a trip to the medical centre to have his knee examined, he struck back in race two, resisting a charge by Max Biaggi over the final few laps to complete his 11th win of the season.

"The good people at the mobile clinic massaged, iced and taped my knee and got me ready to go," Spies said. "The knee was tweaked pretty good, but I figured I could take the pain for 20 laps. They don't get enough credit for the work they do."

"I looked back and saw Max and thought I might be in trouble," Spies added. "He's so good here and he caught me quick. I knew I was going to have to ride mistake free in the closing laps. Max and the Aprilia were very strong and I had to brake ridiculously late and square off the corners to stay ahead of him."

Despite only finishing one race, Spies has still made good inroads into Noriyuki Haga's advantage, with the Yamaha rider heading into the summer break just seven points adrift.

Meanwhile, despite eight races still remaining in his maiden World Superbikes season, Spies' win has moved him up to joint 15th in the all-time winner's list.