Having delivered a new lap record of 1m 54.791s on Saturday morning at Brno, Movistar Yamaha's MotoGP champion Jorge Lorenzo expected to continue his dominance with an even quicker time in qualifying.
Instead, while pole sitter Marc Marquez smashed his FP3 time by one-second in qualifying, Lorenzo lapped slightly slower with a 1m 54.849s - leaving him second to the Repsol Honda rider by 0.253s.
"After the morning - when I made this lap time and went even faster before slowing because of some riders in front - I expected to be much quicker in the afternoon," Lorenzo confessed.
"But the temperature went up and with the second tyre I was maybe too aggressive. Braking too late and maybe opening too much throttle. I didn't improve so much compared to the first lap time.
"The lap time by Marc was impressive. He was really, really fast. I didn't expect him to be so fast. It's impressive, maybe he was also helped by the riders in front of him - maybe it gave him the last push.
"Anyway, today we expected the pole position but second place is a very good knowing we have a very good pace with old tyres and we worked very well to keep a constant pace in the race.
"Let's see about the weather. If the race is dry I think we are prepared."
Lorenzo is 43-points behind Marquez, with eight races to go.
By Peter McLaren