The Aprilia Red Devils dominated the final day of the 2015 World Superbike Championship thanks to victories for Spain's Jordi Torres and Britain's Leon Haslam in Qatar.

Torres took his maiden world superbike victory in the first race while, in the final corner of the second, Haslam edged ahead of Chaz Davies for his second win of the season and fifth of his career.

The day was disastrous for Britain's newly-crowned world champion Jonathan Rea, who required only five points to beat Colin Edwards' record of 552 in a single season, but suffered a mechanical problem in the second race - having finished second in the first - which forced him to retire for the first and last time this season.

Rea had pushed Torres, who led with five laps remaining, intensely in the first race and finished second only by 0.726seconds. Fellow Britons Tom Sykes, Davies and Haslam respectively finished third, fourth and sixth.

In the second race Davies came home second, 0.110secs off the pace with Sykes finishing third. Like Rea, Torres retired.

"Race one was a disaster and to bounce back with a win in Race one, and at the last round was (great)," Haslam said.

"Big thanks to Aprilia and all the guys. I can go home happy now."