Chaz Davies secured his second double victory of the season as second-placed Jonathan Rea extended his World Championship lead to 70 points.

Davies clinched victory in Race 1 on Saturday and followed up with another maximum points haul 24 hours later at the Lausitzring by beating Rea by 2.2 seconds.

Marco Melandri finished third, but Tom Sykes lost further ground in the World Championship scrap after limping home in fourth, 14 seconds adrift of Davies.

Davies made the pass on Rea at half distance and kept a steady one-second gap before Rea settled for second and another 20 points in his pursuit of the World Championship.

Rea weaved his way majestically through the field after starting on the third row, rising to third on lap one, second on lap two and then going on to overtake Melandri at Turn 10 to take the race lead.

However, Rea was in Davies' crosshairs all the way, but he had to make hard work of Xavi Fores before he could launch his attack for the lead.

Davies then began to set lap records, zooming past Melandri on lap 8 and then threading his way under Rea at Turn Four.

From there, Davies managed the gap well and went on to clinch a sixth race win of the season.

Meanwhile, it was another race to forget for Sykes, who left himself with far too much work to do after getting embroiled in a midfield scrap with Fores, Camier and Savadori.

Sykes managed to salvage his afternoon a little, passing Camier for fifth just before the chequered flag.

Race 2 leaderboard

1 Chaz Davies Ducati 34'05.220

2 Jonathan Rea Kawasaki 34'07.510 2.290

3 Marco Melandri Ducati 34'09.608 4.388

4 Tom Sykes Kawasaki 34'19.387 14.167

5 Alex Lowes Yamaha 34'21.006 15.786

6 Leon Camier MV Agusta 34'21.243 16.023

7 Lorenzo Savadori Aprilia 34'21.358 16.138

8 Jordi Torres BMW 34'22.120 16.900

9 Markus Reiterberger BMW 34'25.575 20.355

10 Xavi Fores Ducati 34'29.286 24.066

11 Michael van der Mark Yamaha 34'30.105 24.885

12 Leandro Mercado Aprilia 34'40.786 35.566

13 Stefan Bradl Honda 34'41.992 36.772

14 Roman Ramos Kawasaki 34'43.728 38.508

15 Raffaele De Rosa BMW 34'44.833 39.613

16 Ondrej Jezek Kawasaki 35'05.964 1'00.744

17 Davide Giugliano Honda 35'06.621 1'01.401

18 Ayrton Badovini Kawasaki 35'06.751 1'01.531

19 Massimo Roccoli Yamaha 35'32.862 1'27.642

Ret Randy Krummenacher Kawasaki

Ret Riccardo Russo Yamaha

Ret Pawel Szkopek Yamaha

Ret Eugene Laverty Aprilia