Alex Marquez hits the front now with a 2m13.384s.
Marc Marquez has also improved at the top of the order to a 2m13.411s.
Zarco moves up to second now with a 2m13.553s. About a second away from FP1 times at this stage.
Miller closes the gap to Marquez with a 2m13.813s on his Pramac Yamaha.
Big lap from Fermin Aldeguer. He's just gone second, 0.448s behind Marc Marquez.
Marc Marquez takes over top spot now with a 2m13.546s, putting him a second clear of the field.
First laps are on the board and already we're pretty close to FP1 times. Bagnaia is fastest with a 2m14.513s.
Worth noting that all four KTMs have identical liveries this weekend...
We don't know, either. I can only imagine somebody at KTM thought that would be a funny joke or something.
Looks like there is a bit of an issue with Maverick Vinales' KTM. His crew is removing the front fairing from his bike and he walks back into his garage.
Everyone is heading out on wet tyres to begin with, but there is clear dry patches forming now on the racing line.
Presumably, Jack Miller will be the first to test slicks in this session.
Pitlane is open for Practice.
Just five minutes till the session begins.
Franco Morbidelli led the way in FP1, while Marc Marquez had his first crash of the season as a factory Ducati rider.
Scroll down a little to find the link to our report of the session.
This hour-long session will decide who goes directly into Q2 in qualifying and who has to face Q1.
If there is a drying line, this will make the upcoming session pretty hectic.
It's still wet at COTA, but there is a dry line appearing at the end of the Moto2 session.
Good evening and welcome back to our live coverage of the 2025 MotoGP Americas Grand Prix.
Practice is up in just 15 minutes.
That's all from us for now, but be sure to joins us again from 8pm GMT for coverage of Practice.
In the meantime, keep your eyes fixed on Crash.net for all of the latest news from the COTA paddock.
Read the full FP1 report for the 2025 MotoGP Americas Grand Prix here
Morbidelli ends the morning fastest of all from Miller and Marc Marquez.
Chequered flag is out.
Morbidelli fastest again with a 2m12.531s.
Sounds like low temperatures are what's been causing Aprilia's various bike issues this morning.
Zarco puts a 2m12.838s on the board to go fastest on the LCR Honda.