Rafael Nadal, Robin Soderling, Novak Djokovic and Nikolay Davydenko kick off Group B on Monday.
World No. 1 Novak Djokovic will also line up in the six-man, three-day event.
The victory followed wins for world no.1 Novak Djokovic and Troicki in Friday's singles matches.
One of the pillars of that global push is Serbian tennis ace Novak Djokovic.
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The unquestioned top three are world No. 1 Novak Djokovic, Rafael Nadal and Roger Federer.
World number one Novak Djokovic has already been an outspoken critic of the surface.
Tennis star Novak Djokovic, for instance, credits the diet with improving his on-court endurance.
The fact is, Novak Djokovic is a bona fide super star on and off the court.
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Being Novak Djokovic, it seems, could get a whole lot tougher in the days to come.
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Roger Federer, Novak Djokovic, and Rafael Nadal boasted similarly advanced games at a similarly tender ages.
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In the Australian Open, he lost a heartbreaking five-set semifinal against eventual champion Novak Djokovic.
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In men's play, seven-time champion Rafael Nadal and top-ranked Novak Djokovic were scheduled to play second-round matches.
Top seed Novak Djokovic overcame his troublesome ankle problem to see off Finland's Jarkko Nieminen 6-4 6-3.
So Novak Djokovic, the first Serb ever to win a major, deserves, you know, enormous amount of credit.
Rafael Nadal defeated Novak Djokovic Monday in the French Open Final by the score of 6-4, 6-3, 2-6, 7-5.
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World No.1 Novak Djokovic denied Nadal a ninth straight title in Monte Carlo but sat out the Barcelona event.
Meanwhile, world number two Novak Djokovic pulled out of the Madrid Open on Saturday due to continued breathing problems.
The group who met the Queen also included Venus Williams, Caroline Wozniacki, Jelena Jankovic, Novak Djokovic and Andy Roddick.
But Berdych gave a performance of the very highest order to set up a semi-final meeting with Novak Djokovic.
Serbia's Novak Djokovic, the top seed, was facing American Sam Querrey for a place in the quarterfinals later Thursday.
Ljubicic goes on to face David Ferrer in the last four, while Novak Djokovic will play qualifier John Isner.
Murray, meanwhile, reached the finals on the strength of a 7-5, 7-5 dismissal of second-seeded Novak Djokovic of Serbia.
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World number one Novak Djokovic, Rafael Nadal and Roger Federer will all appear.
So, Andy has only one particular threat in the face of Novak Djokovic.
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Second seed Novak Djokovic and defending champion Andy Murray are among the big names to have already departed the event.
And so the night session, which featured Maria Sharapova and world No. 1 Novak Djokovic, began after 10 p.m.
Roger Federer breezed past John Isner 6-3 6-4 while Novak Djokovic eased to a 6-3 6-3 victory over Ivan Ljubicic.
Federer, who is back at world number two following his semi-final win against Novak Djokovic, paid tribute to the champion.
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Elsewhere, third seed Novak Djokovic saved two set points against Juan Monaco on his way to a 6-3 7-5 victory.
Meanwhile, home favorite Bernard Tomic built on his shock win over world number one Novak Djokovic by defeating Andreas Seppi.
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