Cal Crutchlow was troubled by understeer on the Ducati and a trapped nerve in his back as he ended free practice for the German MotoGP in 13th place.

The British rider's best time of 1m 22.757s left him 0.716s off the pace of Aleix Espargaro and 0.033s behind the Pramac Ducati of Yonny Hernandez at the Sachsenring.

Crutchlow said: "As was to be expected today, the Ducati bikes seem to be struggling with understeer, but we are trying hard to resolve the problem. Today me and the guys tried a few different settings but they didn't give the results we hoped for.

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"We'll check the data tonight and see what we can do for tomorrow," he added. "My main concern at the moment is that I probably have a trapped nerve in the bottom of my back.

"I woke up this morning with a pain, I'm unable to walk very well, but on the bike actually it's not so bad and is of little hindrance."

Crutchlow was only two tenths of a second behind team-mate Andrea Dovizioso in eighth place in FP2.