NATHAN ROBERTSON and Jenny Wallwork's hopes of a second Super Series final in successive weeks were dashed in at the French Open tonight.

The Commonwealth silver and European bronze medallists went down in the quarter-finals in Paris, beaten in a nail-biter against Sudket Prapakamol and Saralee Thoungthongkam 22-20 17-21 21-19.

The England pair, seeded sixth, made a good start and led 17-12 in the opening game against the Thai fourth seeds whom they beat in last week's Denmark Open semi-final in an equally close encounter.

But Prapakamol and Thoungthongkam clawed their way back to 19-19 and took the opener on their second game point.

Robertson and Wallwork made no such slip-up in the second game, leading all the way to take it on their fifth game point.

But there was nothing to choose between the pairs in the decider until the Thai pair edged clear from 16-16 to 19-16 and clinched the contest with their second match point after 71 minutes.

European bronze medallists Mariana Agathangelou and Heather Olver also suffered disappointment in the women's doubles when they lost to Denmark's Christinna Pedersen and Kamilla Rytter Juhl 21-19 21-11.

The England pair were more than a match for the Danes in the opening game but Pedersen and Juhl proved two strong in the second.

In the men's singles Commonwealth silver and European bronze medallist Rajiv Ouseph faced second seed Taufik Hidayat.

The sixth seed from Middlesex lost the opening game 21-13 but led 11-5 and 13-8 before the 2004 Olympic and 2005 world champion hit back to win the second 21-18.

But Ouseph had the satisfaction of keeping the Indonesian star on court for 40 minutes in their first Super Series meeting and will benefit from the experience.

In the women's singles Elizabeth Cann, who knocked out third seed Pi Hongyan of France in the second round, led at the midway stage of both games against Thailand's Porntip Buranaprasertsuk before going down 21-15 21-18.

Even so, the Commonwealth bronze medallist has shown considerable improvement recently under the guidance of singles coach Kenneth Jonassen.

Biggest disappointment came in the men's doubles, where Andrew Ellis and Chris Adcock, who had already beaten the third seeds on day one, came within two points of beating Danish fifth seeds Mads Conrad-Petersen and Jonas Rasmussen before losing 23-25 22-20 21-14 in 68 minutes.

FRIDAY'S QUARTER-FINALS

Mixed doubles: (4) Sudket Prapakamol & Saralee Thoungthongkam (Tha) bt (6) Nathan Robertson & Jenny Wallwork (Eng) 22-20 17-21 21-19.

Women's doubles: Christinna Pedersen & Kamilla Rytter Juhl (Den) bt Mariana Agathangelou & Heather Olver (Eng) 21-19 21-11.

Men's singles: (2) Taufik Hidayat (Ina) bt (6) Rajiv Ouseph (Eng)
21-13 21-18.

Men's doubles:(5) Mads Conrad-Petersen & Jonas Rasmussen (Den) Chris Adcock & Andrew Ellis (Eng) 23-25 22-20 21-14.

Women's singles: Porntip Buranaprasertsuk (Tha) bt Elizabeth Cann 21-15 21-18.

For full results check out www.tournamentsoftware.com