The third seeded Indo-Czech pair beat the Belgian pair of Christophe Rochus and Kristof Vliegen to make the grade.
The Indo-Czech pair beat Morocco's Younes El Aynaoui and Sultan Khalfan of the host country.
Russia's Marat Safin knocked out Swede Robin Soderling in a second-round match at the Paris Masters.
Roger Federer beat Tomas Berdych in the final in Halle to equal Bjorn Borg's record of 41 wins on the trot on grass
Andre Agassi slumped to a 7-5, 7-5 defeat against Bjorn Phau at the Dubai Open
Croatian beanpole Ivo Karlovic upset top-seeded compatriot Ivan Ljubicic to reach the quarter-finals of the grasscourt Nottingham Open on Wednesday.
The third seeded pair lost their semi-final match against unseeded Belgian pair of Xavier Malisse and Oliver Rochus.
The top seeds beat the Belgian duo of Christophe Rochus and Tom Van Houdt to progress to the quarter-finals of the Chennai Open.
The defending champion beat wily Frenchman Fabrice Santoro 7-5, 7-5, 7-6 to reach the third round.
World number one Roger Federer breezed through to the Halle Open semi-finals with a 6-3, 6-4 win over Germany's Philipp Kohlschreiber.
Gustavo Kuerten, returning after a seven-month injury lay-off, was humbled by Alberto Martin in the second round.
The world No.1 shrugged off sweltering conditions beat Olivier Rochus in the second round of the Nasdaq-100 Open.
The duo lost in the quarter-finals of the Pacific Life tennis tournament.
The duo would now take on top seeds Knowles and Nestor in the Pacific Life tennis championship.
The third seeded pair registered a comfortable 6-3, 6-4 win against Karsten Braasch of Germany and Sargis Sargsian of Armenia.
The British ace was beaten by defending champion David Nalbandian in the quarter-finals of the Swiss Indoors.
The top seed breezed to a 6-2, 6-4 victory over Christophe Rochus in the final.
The Spaniard will meet Belgium's Christophe Rochus in the title match at the Valencia Open.