Leander Paes [Images] and his Australian partner Paul Hanley [Images] warded off the challenge of Argentina's David Nalbandian and Guillermo Canas to enter the doubles quarter-finals at the Pacific Life Open tennis tournament in Indian Wells.

The eighth seed Indo-Australian pair beat the Argentine duo 7-5, 2-6, 10-5 in the second round.

Meanwhile, sixth seeds Mahesh Bhupathi [Images] and Mark Knowles of Bahamas won their opening encounter against Germany's [Images] Christopher Kas and Dutch Rogier Wassen 6-3, 7-6 (3) to move into the second round.

Paes and Hanley will take on third seeds Nenad Zimonjic of Serbia and Canada's [Images] Daniel Nestor in their last eight encounter.

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