After two dry sessions on Friday, Saturday morning's final practice at Brno took place in wet conditions - and finished with Casey Stoner on top of the timesheets by just 0.005sec from Yamaha's Jorge Lorenzo.
MotoGP title leader Stoner and John Hopkins both fell in separate incidents at turn three. Stoner, who crashed in the opening minutes, was unharmed and went onto take the lead of the slowly-drying session with seven minutes to go.
However Hopkins - making his second MotoGP appearance of the season for Rizla Suzuki - didn't return after his 14th minute tumble and is having a possible hand injury examined. Hopkins is second in the British Superbike Championship.
Valentino Rossi used the slippery conditions to his advantage and climbed from seventh on Friday to third this morning on his Ducati GP11.1, having lapped just 0.117sec from Stoner.
Stoner's Repsol Honda team-mate Dani Pedrosa, quickest in both Friday sessions, was fourth (+0.331sec) with Nicky Hayden making it two Ducatis in the top five (+0.374sec).
Hiroshi Aoyama, just 16th for Gresini Honda on Friday, jumped to sixth (+0.422sec) and the top satellite rider – but with Monster Yamaha Tech 3 rookie Cal Crutchlow just one place behind him (+0.485sec).
Andrea Dovizioso (Honda), Marco Simoncelli (Honda) and Ben Spies (Yamaha) completed a top ten covered by 0.768sec.
16. de Puniet