Andrea Iannone made significant improvements in FP2 to set the fourth quickest time after struggling in the morning session at Assen with the rear of his Ducati GP15.

Iannone clocked his best time in 1m 33.699s as he finished 0.249s down on Dani Pedrosa and revealed his shoulder injury was playing up at the Dutch circuit.

"The feeling with the bike this morning was not really good but the track improved a little bit and in FP2 we improved a lot with the bike," said Iannone, who was the top Ducati rider on Thursday.

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"I think my team did a good job for me and this is really important for tomorrow. For sure the team has to stay at 100 per-cent because we have some problems with the bike, especially in the rear but I talk with the team and my guys for tomorrow.

"My shoulder is not at 100 per-cent because in Barcelona I feel really good but this morning under acceleration I have pain, not a lot, but I will get a jab from Clinica Mobile for this situation."

Meanwhile, his team-mate, Andrea Dovizioso, was seventh fastest with an FP2 time of 1m 33.844s as the Italian lost time in the morning due to an issue with his GP15.

"In FP1 I had a small problem with the bike so I wasn't able to make a lot of laps. In this track it is quite important to make a lot of laps because to get a rhythm is harder than at the other tracks," he said.

"My feeling on the front is really bad and I lose the confidence on the front so we have to be really focused on that."

Dovizioso was using a thumb brake on Thursday and said it helped improve his feeling mid-corner.

"In the entry I use a lot of the rear brake but in the middle of the corner I use the right hand," he said. "It's good."