Repsol Honda's Marc Marquez followed a familiar trait as the runaway world championship leader hit the top of the time sheets at Brno.
Marquez, who made it ten wins from ten at the Indianapolis MotoGP, took the fastest time of the day, albeit by only 0.037s from Movistar Yamaha's Jorge Lorenzo in FP1 before the rain arrived for the afternoon session.
The world champion was third fastest in the wet, 4.667s behind Pramac Ducati's Andrea Iannone who, along with Hector Barbera, had managed to post a time in mixed conditions at the beginning of the session before the rain intensified.
Marquez, though, says he was pleased with his progress on day one of the Czech MotoGP, but not entirely satisfied.
“I am happy with how the practices went today as the track has changed substantially compared with how it was when we tested here,” he said.
“I expected this, and we adapted our set-up accordingly in the sessions - although I am still not entirely satisfied.
“In the afternoon when the track was wet - especially at the start of FP2 - I was able to lap consistently and I felt good which is important,” he added.
“We will see what the weather is like tomorrow and if we can have a good qualifying session.”