Jonathan Rea closed out day-one of Official WorldSBK testing quickest ahead of Leon Haslam and Garrett Gerloff.

Sixth at the midday stage, Rea took over top spot from his main championship contender of last season Scott Redding who had previously led at the midday stage. Redding finished the day fourth for Ducati.

The opening four hours were a competitive one at the Circuit de Barcelona-Catalunya, with Ducati and Yamaha exchanging fastest times.

And the afternoon running was just as intriguing, as five different manufacturers finished inside the top five. 

The Circuit de Barcelona-Catalunya made it's debut on the WorldSBK calendar in 2020, with Jonathan Rea, Michael Van Der Mark and Chaz Davies all taking a victory each. 

2021 official World Superbike barcelona Test Times - day one, final
1Jonathan ReaGBRKawasaki Racing Team1:40.793
2Leon HaslamGBRHRC+0.107s
3Garrett GerloffUSAGRT Yamaha+0.117s
4Scott ReddingGBRAruba.It Ducati+0.169s
5Tom SykesGBRMotorrad BMW+0.472s
6Toprak RazgatliogluTURPATA Yamaha+0.541s
7Jonas FolgerGERBenovo BMW+0.805s
8Michael Ruben RinaldiITAAruba.It Ducati+0.955s
9Chaz DaviesGBRGoEleven Ducati+0.982s
10Andrea LocatelliITAPATA Yamaha+1.133s
11Alvaro BautistaGBRHRC+1.157s
12Alex LowesGBRKawasaki Racing Team+1.173s
13Michael Van Der MarkNEDMotorrad BMW+1.253s
14Axel BassaniITAMotocorsa Ducati+1.884s
15Kohta NozaneJPNGRT Yamaha+1.965s
16Tito RabatSPABarni Ducati+2.026s
17Isaac VinalesSPAOrelac Kawasaki+2.130s
18Christophe PonssonFRAGil Yamaha+3.607s
19Leandro MercardoARGMIE Honda Racing+4.164s
20Samuele CavalieriITAPedercini Kawasaki+4.641s