Garrett Gerloff has taken top spot in a WorldSBK session for the first time this season after bettering pole sitter Scott Redding late on in warm-up at San Juan. 

It was Toprak Razgatlioglu who led the way following every rider’s opening lap, while Jonathan Rea and Redding sat second and third. 

Redding, who starts on pole for today’s Superpole race, then went quickest with a 1m 38s flat - two tenths better than Razgatlioglu’s second effort. There was an early crash for Orelac Kawasaki rider Isaac Vinales at turn 13. 

Razgatlioglu then bettered Redding’s top time by just - 0.019s with six minutes to go, while Alex Lowes moved ahead of team-mate Rea for third. 

Razgatlioglu’s fourth lap saw him break the 1m 38s barrier to move two tenths clear of Redding. 

However, the Ducati rider quickly responded by going another tenth and a half quicker than Razgatlioglu. 

Rea managed to split Redding and Razgatlioglu late on, before a brilliant effort by Gerloff saw him go fastest overall.

World Superbike San Juan, Argentina - Warm-up Results
1Garrett GerloffUSAGRT Yamaha1:37.719s
2Scott ReddingGBRAruba.It Ducati+0.016s
3Jonathan ReaGBRKawasaki Racing Team+0.141s
4Toprak RazgatliogluTURPATA Yamaha+0.177s
5Alex LowesGBRKawasaki Racing Team+0.456s
6Michael Van Der MarkNEDMotorrad BMW WorldSBK Team+0.786s
7Chaz DaviesGBRGoEleven Ducati+0.849s
8Andrea LocatelliITAPATA Yamaha+0.944s
9Axel BassaniITAMotocorsa Ducati+1.032s
10Michael RinaldiITAAruba.It Ducati+1.043s
11Leon HaslamGBRTeam HRC+1.153s
12Tito RabatITAKawasaki Puccetti+1.343s
13Kohta NozaneJPNGRT Yamaha+1.424s
14Alvaro BautistaSPATeam HRC+1.665s
15Eugene LavertyIRLMotorrad BMW WorldSBK Team+1.678s
16Isaac VinalesSPAOrelac Racing Kawasaki+1.872s
17Leandro MercadoARGMIE Honda Racing+1.898s
18Samuele CavalieriSPABarni Ducati+2.145s
19Christophe PonssonFRAGil Yamaha+2.981s
20Luciano RibodinoARGPedercini Kawasaki+4.423s
21Marco SolorzaARGPedercini Kawasaki+5.364s