Chaz Davies (Aruba.it Racing - Ducati) became the first non-Kawasaki race winner of the 2016 season when he took the opening race win after 18-laps at Motorland Aragon.
He broke the lap record on lap three with a 1’50.421 and eased past race leader Tom Sykes (Kawasaki Racing Team) before heading off to an eventual margin of victory of 4.168 seconds.
Second in the race was Jonathan Rea (Kawasaki Racing Team) who finally held off pole sitter Sykes.
In the championship Rea has 115 points, Sykes 82 and Davies 80.
After he fell from contention Michael van der Mark (Honda World Superbike Team) is fourth on an unchanged 65 points.
A great ride from local rider Xavi Fores (Barni Racing Team Ducati) saw him work his way to fourth place in the race, beating the factory Panigale of Davide Giugliano (Aruba.it Racing – Ducati) in the final laps.
Nicky Hayden (Honda World Superbike Team) was sixth but 21 seconds from the winner. Another local rider Jordi Torres (Althea BMW Racing Team) placed seventh.
Alex Lowes (Pata Yamaha Official WorldSBK Team) dropped places in the early laps after a front row start but recovered to go eighth.
His team-mate Sylvain Guintoli (Pata Yamaha Official WorldSBK Team) was second for some time but dropped back and ended up crossing the line ninth. His bike quit on the exit of pitlane after he got over the line.
Lorenzo Savadori (IodaRacing Team Aprilia) and his team-mate Alex De Angelis finished 10th and 11th respectively.
Local man Roman Ramos (Team GOELEVEN Kawasaki) finished in 12th place, with reigning BSB Champion Josh Brookes (Milwaukee BMW)
13th. Leon Camier (MV Agusta Reparto Corse) lost time and dropped out of the race with a technical problem.
Race two is scheduled for 13.00 tomorrow, Sunday 3rd April.