They will either face Bhupathi-Damm or the Bryan brothers in the second round of the Madrid Masters.
They won the Monte Carlo Masters doubles at Monaco after their third seeded opponents Bob and Mike Bryan conceded a walk-over in the final.
The top seed suffered a shock defeat in the first round of the St Poelten Grand Prix to Serbian Nenad Zimonjic.
The Indo-Serb pair beat Spaniards Nicolas Almagro and Fernando Verdasco 7-5, 6-3 in the first round.
Fifteenth seeds Samantha Stosur and Nenad Zimonjic claimed the mixed doubles title with a 6-4, 6-2 win against 14th seeds Chan Hao-Ching of Taiwan and Max Mirnyi of Belarus at Wimbledon on Sunday in the final match of the 2014 championships.
The duo would now take on top seeds Knowles and Nestor in the Pacific Life tennis championship.
Leander Paes and Nenad Zimonjic beat the Bryan brothers 3-6, 7-6 (5), 7-5 in the quarterfinals.
A report has surfaced from a Serbian publication which reveals that World No. 2 Novak Djokovic could sign up his Davis Cup teammate Nenad Zimonjic as a new coach. Djokovic last week parted ways with Boris Becker, who coached him for three years following a disappointing end to the year, where he lost his world number one ranking to Andy Murray.
Leander Paes and Nenad Zimonjic beat Wayne Arthur and Paul Hanley of 6-3, 6-4 in the semifinal.
After two wins, the Indo-Serbian pair lost in their third outing in the Tennis Masters Cup doubles but qualified for the semi-finals.
The fifth seeded Indo-Serbian pair beat seventh seeds Wayne Arthurs and Paul Hanley in their second match of the Masters Cup tennis tournament.
The sixth seed Indo-Serbian duo lost to Michael Llodra and Fabrice Santoro of France, seeded eighth, 6-3, 6-2.
The fifth-ranked doubles pair lost to Jonathan Elrich and Andy Ram of Israel in the Paris Masters.
The Indo-Serbian pair shocked fourth seeds Michael Llodra and Fabrice Santoro in the semi-finals of the Madrid Masters on Saturday.
The duo lost in the quarter-finals of the Pacific Life tennis tournament.
The second seeds beat the French combine of Jean-Francois Bachelot and Gregory Carraz in straight sets to enter the quarter-finals of the Chennai Open.
Second seeds Daniel Nestor and Nenad Zimonjic defeated Jonas Bjorkman and Kevin Ullyett 7-6 6-7 6-3 6-3 to win their first Wimbledon doubles title on Saturday.
The Indo-Serbian pair beat Mark Knowles-Daniel Nestor in their opening match at the ATP Masters Cup.
World number one Novak Djokovic is considering going without a coach after 20 years in professional tennis, the Serb said after receiving the top men's honour at the Laureus awards.
The Indo-Serbian pair lost 6-7(6), 6-3, 7-6(4) to Fabrice Santoro and Michael Llodra in the Masters Cup final
The pair made it to the elite season-ending tournament as the fifth-ranked team.
The Indo-Serbian pair will meet seeded Michael Llodra and Fabrice Santoro of France in the title match.
The third seeds went down to the unseeded Croatian pair of Ivo Karlovic and Lovro Zovko at the Swiss Indoors tournament.
The top seeds were shocked by Tommy Haas of Germany and Jurgen Melzer of Austria in the \nPilot Pen tournament.
Novak Djokovic said he is building up to hit top form for his French Open title defence.
Novak Djokovic said he is still hoping for a final chapter in their storied rivalry.
Novak Djokovic's bid for a record 25th Grand Slam title kicked off on Monday with an easy win over qualifier Radu Albot in the US Open first round.
Novak Djokovic steered Serbia into the Davis Cup semi-finals with a straightforward 6-4 6-4 win over Britain's Cameron Norrie to give his team a winning 2-0 lead on Thursday.
Jelena Jankovic teamed up with men's world number one Djokovic at his tennis complex in Serbia's capital and beat the duo of Serbia's Davis Cup captain Nenad Zimonjic and 19-year-old prospect Olga Danilovic 7-6 in a mixed doubles contest.
Indian tennis ace Rohan Bopanna won his third title of the 2015 season and first with new partner Florin Mergea as they lifted the Madrid Open trophy with a tense win over Nenand Zimonjic and Martin Matkowski in Madrid on Sunday.
Leander Paes yet again turned the clock back in company of Rohan Bopanna as the Indian duo recorded a dramatic come-from-behind 1-6, 6-7(4), 6-3, 6-3, 8-6 win over Serbian pair of Nenad Zimonjic and Ilija Bozoljac to keep home team's chances alive in the Davis Cup World Group play-off tie in Bangalore on Saturday
UAE Royals returned to winning ways by posting a thrilling 26-21 victory over Manila Mavericks on Day 2 of the Singapore leg of the International Premier Tennis League.
Leander Paes and Daniel Nestor put up a stiff resistance before losing the semi-final of the Aegon Championships to the team of Nenad Zimonjic and Marcin Matkowski in Birmingham.
The Indo-Czech pair were defeated 6-7, 6-7 by second seeds Daniel Nestor and Zimonjic in the quarter-finals of the Cincinnati Masters.
Daniel Nestor and Nenad Zimonjic beat the Indo-Czech duo 6-3, 7-6(5) in the semi-final of the Toronto Masters.
France will meet Serbia in the semi-finals of the Davis Cup after both finished off their last-eight ties inside two days on Saturday but Australia and Belgium were made to sweat.
It would have been great for Indian tennis had Novak Djokovic decided to turn up in this week's Davis Cup tie in Bangalore, country's leading singles star Somdev Devvarman said.
Paes and Nenad Zimonjic entered the semi-finals of the Madrid Masters beating Mahesh Bhupathi and Martin Damm on Friday.
Leander Paes and Mahesh Bhupathi are on course for their maiden Australian Open title together as they advanced to the semi-finals after a hard-fought victory over the combine of Michael Llodra of France and Nenad Zimonjic of Serbia in Melbourne on Wednesday.
Holders Czech Republic took a 2-1 lead over hosts Serbia in the Davis Cup final after Tomas Berdych and Radek Stepanek romped to a 6-2, 6-4, 7-6(4) win over Nenad Zimonjic and Ilija Bozoljac in Saturday's doubles.