Noriyuki Haga continues to lead the after two rounds of the World Superbike Championship, although Ben Spies' double triumph at Losail has sliced the margin in half to ten points.

Their success is already making this year's title race into something of a two-horse race, with Spies now already 35 points up on third position Max Neukirchner.

The German drops just one place despite a dismal weekend in Qatar, although he is now just two points ahead of double podium winner Max Biaggi, who leaps up from 13th.

Leon Haslam drops to fifth after two 11th place finishes, while a maiden top five result with Yamaha for Tom Sykes lifts him up to sixth.

In all, 20 of the 28 riders have now scored points in the first four races.

In the manufacturers' championship, Ducati remain in the lead, four points up on Yamaha. Honda is third, while Aprilia are up to fourth from sixth.

Full World Superbike Championship rider standings (After 2 rounds of 14 - Previous position in brackets)

1. (1) Noriyuki Haga Ducati Xerox 85 points 2. (4) Ben Spies Yamaha WSB 75 3. (2) Max Neukirchner Suzuki Alstare Brux 40 4. (13) Max Biaggi Aprilia 38 5. (3) Leon Haslam Stiggy Honda 36 6. (10) Tom Sykes Yamaha WSB 32 7. (7) Regis Laconi DFX Ducati 30 8. (8) Jonathan Rea Ten Kate Honda 27 9. (15) Shinya Nakano Aprilia 27 10. (5) Yukio Kagayam Suzuki Alstare Brux 25 11. (6) Michel Fabrizio Ducati Xerox 24 12. (11) Troy Corser BMW Alpha 22 13. (-) Ryuichi Kiyonari Ten Kate Honda 21 14. (12) Carlos Checa Ten Kate Honda 21 15. (9) Jakub Smrz Guandalini Ducati 16 16. (-) Shane Byrne Sterilgarda Ducati 14 17. (14) Ruben Xaus BMW Alpha 14 18. (16) Tommy Hill Althea Honda 5 19. (17) Roberto Rolfo Stiggy Honda 3 20. (-) Broc Parkes Kawasaki WSB 2

Full World Superbike Championship manufacturer standings (After 2 rounds of 14 - Previous position in brackets)

1. (1) Ducati 85 points 2. (2) Yamaha 81 3. (4) Honda 51 4. (6) Aprilia 41 5. (3) Suzuki 40 6. (5) BMW 27 7. (-) Kawasaki 2