CHENNAI, Dec 16: Australians David Palmer and Cameron White make sure of two medals apiece after separately winning quarterfinals in both men's and mixed events in World Doubles Squash Championship here.

The local crowd was delighted in unexpected demise of Australia's 3/4 seeds Dan Jenson and Cameron Pilley as Indian duo Ritwik Bhattacharya and Saurav Ghosal, seeded in 5/8 group, won a tense 71-minute men's battle to guarantee unexpected medals.

Top seeds in men's event, David Palmer and Anthony Ricketts beat Pakistan's 5/8 seeds Safeer Ullah Khan and Farrukh Zaman 9-3 9-7 9-7 to set up an all-Australian semi-final against Byron Davis and Cameron White, 5/8 seeds who triumphed 9-5 9-6 9-5 over Hong Kong's Wai Hang Wong and Roger Ngan.

Later Palmer teamed up with fellow British Open champion Rachael Grinham to beat Hong Kong's Rebecca Chiu and Faheem Khan 9-4 9-2 9-3 in last eight of mxed event. Palmer's reward is another semi-final clash with compatriot Cameron White who, with Dianne Desira, beat India's Joshna Chinappa and Saurav Ghosal in the quarterfinal.

But local interest was focussed on men's quarterfinal between Bhattacharya and Ghosal, national senior and junior champions of India, respectively, and higher seeded Australians Dan Jenson and Cameron Pilley - which Indian pair won 9-3 11-8 4-9 8-9 9-6 in 71 minutes.

They now face the USA pairing Jamie Crombie and Preston Quick, Also 5/8 seeds, who upset Pakistan's 3/4 seeds Mansoor Zaman and Shahid Zaman 8-9 11-10 9-7 9-6. -PPI