Nicky Hayden refused to blame team-mate Andrea Dovizioso after the factory Ducati pair were overtaken by Bradley Smith on the final lap of the Dutch MotoGP.

Dovizioso dived underneath Hayden at Assen's famous chicane and the pair ran wide, allowing Tech 3 Yamaha rider Smith to drive past both riders on the blast to the chequered flag.

Italian ace Dovizioso conceded the move had been 'on the limit', but Hayden wasn't pointing the finger of blame at his team-mate after a disappointing weekend for Ducati, with Dovizioso finishing in tenth, one place ahead of the American star.

"It's been a very hard weekend, right from the beginning. There wasn't much grip here, which certainly didn't help us," said Hayden.

"We tried hard to make the bike better, but we couldn't ever really get it working. It was quite difficult in the race, especially in change of direction.

"The bike was moving a lot, and I was pushing the front in a couple of the fast corners," he added.

"I was really at the limit, and every time I tried to push a little harder to close the gap, I'd run a bit wide or lose the front.

"On the last lap, I didn't get a good run through turn 15 and Dovi came up the inside and pushed us both wide, so Smith beat us both to the line.

"It was a racing move, and anyway, the real problem is we got beat by 33 seconds, which shows how far behind we are."

Ducati has organised a three-day test at Misano this week aimed at improving the Desmosedici GP13, with Hayden and Dovizioso set to attend on Wednesday and Thursday.

Paolo Ciabatti, Ducati MotoGP Project Director, said three days of hard work lie ahead at Misano as the team strives to make improvements with the GP13.

"We knew that Assen was a circuit that didn't favour the characteristics of our bike, but today's result is obviously very disappointing," he said.

"We realised right from the start of Thursday practice that it would be a difficult weekend, and unfortunately, despite our technicians' hard work and our riders' best efforts, we weren't able to improve the situation.

"Next week we'll be at Misano with our test riders and our team riders. We're expecting three days of hard work to find solutions to make our bike more competitive."