Bagnaia fast in the first split, and he maintains strong speed in sectors two and three, and the Italian takes us into the 1:52s. A 1:52.715 puts him clear by 0.397s over Alex Rins, who has also improved on his first lap of his second run.
Di Giannantonio leads Espargaro, then, as Bagnaia now heads out for his second run. He's P6 at the moment and 0.542s behind Di Giannantonio on the same bike.
First lap times coming in now and it's Fabio Di Giannantonio with the early benchmark - a 1:53.131.
Pol Espargaro second at the moment, then Binder, Oliveira, Bagnaia.
Q1 is underway in Brno. Top-two advance to Q2.
Bagnaia, Di Giannantonio, and Aldeguer all in here on Ducatis, as is 2020 Brno winner Brad Binder.
Pol Espargaro, who was good in FP2 there, also taking part in this first session.
We also have Alex Rins, Miguel Oliveira, and Augusto Fernandez for Yamaha, plus both Trakchouse Aprilias, and Luca Marini and Takaaki Nakagami on Hondas - Nakagami riding in place of Somkiat Chantra at LCR.
International TV feed reporting Bagnaia is looking to go out on his second bike for Q1, unhappy with his setting on the first bike he used in FP2.
Marc Marquez tops FP2 in Brno on a 1:53.145 thanks to a late improvement.
Jack Miller and Fabio Di Giannantonio complete the top-three.
Alex Marquez and Pol Espargaro, repalcing Maverick Vinales at Tech3, also in the top-five.
Quartararo sixth ahead of Acosta, Zarco, Bezzecchi, and Mir in the top-10.
Concern for Bagnaia who ends down in 18th. He'll be back out in eight minutes for Q2 at 10:50.
It is at least full dry conditions this morning after yesterday's rain.
Expect 1:52s in qualifying later this morning. Marquez, on a medium rear tyre, now down to a 1:53.284 during this FP2 session that is typically used for establishing race pace and setup.
FP2 currently winding down. Five minutes to go in the final practice session of the weekend, and it's Marc Marquez who is fastest on a 1:53.537.
Marquez was also fastest in both sessions yesterday.
Welcome to live coverage of today's qualifying session from the Czech MotoGP at Brno. Q1 will be getting underway in just over 15 minutes at 10:50 local time.