Troy Bayliss secured a double race win in Holland to stretch his World Superbike Championship lead to 70 points.
The Australian had put his Xerox Ducati on pole position and also took both race wins at Assen as he continued to dominate his final series before retirement.
Bayliss took his points total to 178 as Spaniard Carlos Checa moved up to second in the standings after two podium finishes at Assen on the HANNspree Ten Kate Honda.
Bayliss was delighted with his perfect weekend which saw him add his second double race win of the season to pole position.
"It's been an incredible weekend, taking pole and two race wins is a great way to finish it off," said Bayliss following his final race at Assen.
Bayliss won the first race after Japanese rider Yukio Kagayama made a mistake while leading at one third distance.
Bayliss took over at the front and from that point was able to control the race to take the victory.
Checa waited patiently before easing past Kagayama's Alstare Suzuki team-mate Max Neukirchner to take the runner-up spot, with Kagayama back in fourth ahead of Troy Corser on the Yamaha Motor Italia machine.
A relieved Bayliss, who saw the condition of his tyres deteriorate late in the race, said: "I'm very happy with the way it turned out.
"I made a really good start but it's a long time to be out there (in the lead) by yourself.
"I was looking around more than normal but I wanted to see where Carlos was."
Checa had taken out Neukirchner at the previous round in Valencia with a desperate late pass and did not want a repeat at Assen.
The Spaniard said: "I have thought about what happened in Valencia. My front tyre was not so good but when I saw a place where I could pass Max I went past him."
Race two was a four-way battle at the front with Bayliss leading Japan's Nori Haga on the Yamaha Motor Italia machine, German Neukirchner and the Sterilgarda Ducati of Ruben Xaus.
Bayliss and Haga broke away and it was the Australian who held off his rival to complete his double race win.
Xaus had got the better of Neukirchner but his hopes of a podium spot were dashed in the closing stages as Checa closed in and grabbed third place.
Leading positions after the 1st Race: 1 Troy Bayliss (Aus) Ducati 36mins 50.907secs, 2 Carlos Checa (Spa) Honda 36:53.039, 3 Max Neukirchner (Ger) Suzuki 36:53.086, 4 Yukio Kagayama (Jpn) Suzuki 37:01.826, 5 Troy Corser (Aus) Yamaha 37:01.958, 6 Jakub Smrz (Cze) Ducati 37:02.886, 7 Ryuichi Kiyonari (Jpn) Honda 37:06.091, 8 Makoto Tamada (Jpn) Kawasaki 37:09.302, 9 Gregorio Lavilla (Spa) Honda 37:09.541, 10 Max Biaggi (Ita) Ducati 37:11.606, 11 Regis Laconi (Fra) Kawasaki 37:16.666, 12 Kenan Sofuoglu (Tur) Honda 37:16.971, 13 Ayrton Badovini (Ita) Kawasaki 37:26.489, 14 Karl Muggeridge (Aus) Honda 37:27.173, 15 Shinichi Nakatomi (Jpn) Yamaha 37:28.122
Leading positions after the final Race: 1 Troy Bayliss (Aus) Ducati 36mins 46.238secs, 2 Noriyuki Haga (Jpn) Yamaha 36:46.320, 3 Carlos Checa (Spa) Honda 36:52.574, 4 Ruben Xaus (Spa) Ducati 36:53.813, 5 Max Neukirchner (Ger) Suzuki 36:54.249, 6 Yukio Kagayama (Jpn) Suzuki 37:00.237, 7 Gregorio Lavilla (Spa) Honda 37:01.453, 8 Jakub Smrz (Cze) Ducati 37:02.614, 9 Makoto Tamada (Jpn) Kawasaki 37:03.507, 10 Troy Corser (Aus) Yamaha 37:04.618, 11 Fonsi Nieto (Spa) Suzuki 37:05.164, 12 Max Biaggi (Ita) Ducati 37:07.690, 13 Karl Muggeridge (Aus) Honda 37:10.032, 14 Roberto Rolfo (Ita) Honda 37:16.085, 15 Shinichi Nakatomi (Jpn) Yamaha 37:16.490
World Superbikes Driver Standings: 1 Troy Bayliss (Aus) Ducati 178pts, 2 Carlos Checa (Spa) Honda 108, 3 Troy Corser (Aus) Yamaha 89, 4 Fonsi Nieto (Spa) Suzuki 85, 5 Ruben Xaus (Spa) Ducati 81, 6 Noriyuki Haga (Jpn) Yamaha 67, 7 Max Neukirchner (Ger) Suzuki 66, 8 Max Biaggi (Ita) Ducati 54, 9 Gregorio Lavilla (Spa) Honda 48, 10 Lorenzo Lanzi (Ita) Ducati 42
Manufacturers's Championship Standings: 1 Ducati 190pts, 2 Yamaha 126, 3 Suzuki 113, 4 Honda 109, 5 Kawasaki 37
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