Championship leader Toprak Razgatlioglu finished the opening World Superbike practice at Jerez fastest from Michael Rinaldi.
Jonathan Rea led the way early on before Alex Lowes then bettered his British team-mate. Razgatlioglu was less than a tenth behind the two Kawasaki riders in P3.
Lowes remained top until Rea regained top spot with 18 minutes left. However, Razgatlioglu soon improved on Rea’s time by a further three tenths.
Winner of race two in Catalunya, Rinaldi jumped into third ahead of Lowes late on, before turning that into second. Rea finished P3 – +0.337 down on his title rival Razgatlioglu.
Andrea Locatelli suffered an early crash at turn one after running through the gravel and losing the front end at slow speed.
FIM World Endurance rider Marvin Fritz was back in WorldSBK action for the second time this year after making a wildcard appearance in Most, Czech Republic, while Loris Baz and Eugene Laverty replaced the injured Chaz Davies and Tom Sykes.
WORLD SUPERBIKE JEREZ, SPAIN – FREE PRACTICE 1 RESULTS
| POS | RIDER | NAT | TEAM | TIME |
| 1 | Toprak Razgatlioglu | TUR | PATA Yamaha | 1:40.074s |
| 2 | Michael Rinaldi | ITA | Aruba.it Ducati | +0.086s |
| 3 | Jonathan Rea | GBR | Kawasaki Racing Team | +0.337s |
| 4 | Alex Lowes | GBR | Kawasaki Racing Team | +0.439s |
| 5 | Leon Haslam | GBR | Team HRC | +0.675s |
| 6 | Andrea Locatelli | ITA | PATA Yamaha | +0.692s |
| 7 | Michael Van Der Mark | NED | Motorrad BMW WorldSBK Team | +0.699s |
| 8 | Scott Redding | GBR | Aruba.It Ducati | +0.764s |
| 9 | Garrett Gerloff | USA | GRT Yamaha | +0.855s |
| 10 | Axel Bassani | ITA | Motocorsa Ducati | +0.856s |
| 11 | Loris Baz | FRA | GoEleven Ducati | +1.017s |
| 12 | Alvaro Bautista | SPA | Team HRC | +1.099s |
| 13 | Isaac Vinales | SPA | Orelac Racing Kawasaki | +1.192s |
| 14 | Leandro Mercado | ARG | MIE Honda Racing | +1.228s |
| 15 | Jonas Folger | GER | Benovo BMW | +1.243s |
| 16 | Lucas Mahias | FRA | Kawasaki Puccetti | +1.438s |
| 17 | Christophe Ponsson | FRA | Gil Yamaha | +1.517s |
| 18 | Kohta Nozane | JPN | GRT Yamaha | +1.779s |
| 19 | Marvin Fritz | GER | IXS-YART Yamaha | +1.881s |
| 20 | Eugene Laverty | IRL | Motorrad BMW WorldSBK Team | +2.214s |
| 21 | Samuele Cavalieri | SPA | Barni Ducati | +2.429s |
| 22 | Andrea Mantovani | ITA | Vince64 Racing Kawasaki | +2.444s |
| 23 | Loris Cresson | BEL | Pedercini Kawasaki | +3.409s |
| 24 | Lachlan Epis | AUS | Pedercini Kawasaki | +5.524s |
