Accidents aside, Hayden set the seventh fastest combined practice time (+0.542s), with Dovizioso in ninth (+0.820s), Iannone eleventh (+0.978s) and Pirro 14th (1.461s).
“I've had a pretty good pace today, especially compared to Assen,” confirmed Hayden. “For my fast lap, a half-second from the front is a lot on this short track, but my ideal time is a couple of tenths better.”
The American added that the turn eleven Ducati incidents illustrated the ongoing front-end issues: “When it's difficult to put heat in the front tyre, turn 11 is tough for everybody, especially us.”
Tech 3 Yamaha's Cal Crutchlow, linked to Ducati for 2014, also fell at that corner.
Ducati is now owned by German brand Audi.