While Fabrizio gave himself too much to do when an early fall necessitated a rush back to the pit lane to jump on his unfavourable spare bike, Haga was off-form throughout as he gradually slipped down the timesheets, the Japanese rider sitting in the pit lane as he watched Lorenzo Lanzi and then Luca Scassa on their privateer Ducatis leapfrog them in the final seconds.
Embarrassingly for the Ducati Xerox team, it means all five satellite 'twins' will start ahead of both Fabrizio and Haga come race day.
Fabrizio was not the only rider to hit the deck during the session, with both James Toseland and Max Neukirchner suffering fairly sizeable offs.
Toseland was sent skyward by his bucking Yamaha after it high-sided through the long final bend, the Briton needing a few moments to collect himself before walking unaided to the track side.
Neukirchner, meanwhile, was lucky not to have suffered any injuries after a spectacular accident that left him sprawled in the middle of the circuit while his Ten Kate Honda destroyed itself through the gravel trap. The German even made it out in Q2, but would qualify no higher than 13th.
Just outside the top eight, Sylvain Guintoli was a solid ninth for Suzuki, while Ruben Xaus posted one of his best qualifying performances on the BMW to date with a run to tenth position.
Leon Camier will start 11th on the second Aprilia, ahead of Tom Sykes' Kawasaki, Neukirchner and Lorenzo Lanzi, while Toseland at least gets to start 15th rather than 16th after Scassa failed to set a time in Q2.