Brad Binder moves up 16 places to go fourth.
Down in 15th, Vinales has returned to pit lane and is very animated.
There's just under ten minutes remaining of FP1 as Aleix Espargaro continues to lead the way.
Fabio Quartararo gets it wrong at turn 8 and runs off-track.
Aleix Espargaro has suffered a fast crash at turn 16.
It's turning out to be another strong showing from Ducati as five of the top ten riders are aboard Ducati machines.
Aleix Espargaro and Francesco Bagnaia are the riders with early pace as they continue to exchange top spot.
Big moment for Mir coming out of turn six as he lights up the rear of his Suzuki GSX-RR.
After completing a couple of laps on his own, Marquez is already looking at home behind Enea Bastianini.
And we're underway with MotoGP FP1 at Aragon.
Marquez described his podium chances at Aragon at 1% ahead of the weekend, but can the Spaniard spring a shock result?
Moto3 FP1 - CLICK HERE for the full results
Joining Joan Mir in making his return is eight-time world champion Marc Marquez.
Good monring and welcome to day-one of the Aragon MotoGP. Coming up next is MotoGP FP1.