Espargaro and Aprilia start the Catalunya MotoGP weekend on top of the timesheets in FP1.

Morbidelli second for Petronas Yamaha, with Pol makingit two Espargaro brothers in the top three.

Alex Rins is absent after suffering a wrist fracture while training at the track on his bicycle on Thursday morning.

Vinales is working with new crew chief Silvano Galbusera for the first time this weekend, having split form Esteban Garcia following Mugello.

Turn 10 in Barcelona has been redesigned in time for this year's MotoGP event, with the sharp 'F1 corner' at the end of the back straight replaced by a more flowing layout similar to the original turn, used until 2016.

Rookie Jorge Martin is back this weekend after missing the last three rounds due to multiple fractures in Portimao.

Marc Marquez is taking part in his fifth event since returning to MotoGP action, but continues to struggle with his right arm and shoulder.

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Catalunya MotoGP, Barcelona - Free Practice (1) Results
1Aleix EspargaroSPAAprilia Gresini (RS-GP)1'40.378s17/18347k
2Franco MorbidelliITAPetronas Yamaha (YZR-M1)+0.024s5/19342k
3Pol EspargaroSPARepsol Honda (RC213V)+0.373s6/19348k
4Maverick ViñalesSPAMonster Yamaha (YZR-M1)+0.375s8/24345k
5Johann ZarcoFRAPramac Ducati (GP21)+0.389s10/19350k
6Fabio QuartararoFRAMonster Yamaha (YZR-M1)+0.475s5/20344k
7Miguel OliveiraPORRed Bull KTM (RC16)+0.549s7/18346k
8Joan MirSPASuzuki Ecstar (GSX-RR)+0.582s5/16347k
9Jack MillerAUSDucati Team (GP21)+0.613s10/20353k
10Francesco BagnaiaITADucati Team (GP21)+0.707s11/18347k
11Takaaki NakagamiJPNLCR Honda (RC213V)+0.756s5/20345k
12Jorge MartinSPAPramac Ducati (GP21)*+0.807s15/15351k
13Marc MarquezSPARepsol Honda (RC213V)+0.830s6/20346k
14Danilo PetrucciITAKTM Tech3 (RC16)+0.876s17/20346k
15Valentino RossiITAPetronas Yamaha (YZR-M1)+0.889s5/20344k
16Iker LecuonaSPAKTM Tech3 (RC16)+0.979s5/18341k
17Enea BastianiniITAAvintia Ducati (GP19)*+0.985s9/19345k
18Alex MarquezSPALCR Honda (RC213V)+1.059s4/21347k
19Luca MariniITASky VR46 Avintia Ducati (GP19)*+1.086s11/19344k
20Brad BinderRSARed Bull KTM (RC16)+1.134s11/19350k
21Lorenzo SavadoriITAAprilia Gresini (RS-GP)*+1.366s17/18342k

* Rookie.
Former Catalunya MotoGP records:
Best lap:
Jorge Lorenzo SPA Ducati 1m 38.680s (2018)
Fastest race lap:
Jorge Lorenzo SPA Ducati 1m 40.021s (2018)

By Peter McLaren