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B)MELBOURNE, AUSTRALIA - JANUARY 28: Roger Federer of Switzerland in action against David Nalbandian of Argentina during day ten of the Australian Open Grand Slam at Melbourne Park January 28...

INDIAN WELLS, CA - MARCH 18: Rafael Nadal of Spain cools down between games against David Nalbandian of Argentina during the BNP Paribas Open at the Indian Wells Tennis Garden March 18, 2009...

MELBOURNE, AUSTRALIA - JANUARY 21: David Nalbandian of Argentina reacts after a point in his second round match against Yen-Hsun Lu of...

SYDNEY, AUSTRALIA - JANUARY 15: David Nalbandian of Argentina plays a backhand during the quarter final match against Lleyton Hewitt of Australia during...

Argentina's players Agustin Calleri (R) and David Nalbandian watch the end of the Davis Cup 2008 World Group final match between Fernando Verdasco and...

Argentina's tennis player David Nalbandian talks during a press conference in Mar del Plata, Argentina on November 24, 2008. Argentina was...

Spain's tennis players Feliciano Lopez (R) and Feliciano Lopez return the ball to Argentina's David Nalbandian and Agustin Calleri during the double match of the Davis Cup final, at Islas Malvinas stadium...

MAR DEL PLATA, ARGENTINA - NOVEMBER 22: David Nalbandian (L) and Agustin Calleri of Argentina play Feliciano Lopez and Fernando Verdasco of Spain during the...

MAR DEL PLATA, ARGENTINA - NOVEMBER 21: David Nalbandian of Argentina returns a shot to David Ferrer of Spain during the first rubber of the...

MAR DEL PLATA, ARGENTINA - NOVEMBER 20: David Nalbandian (L) and Juan Martin del Potro of Argentina talk during the draw ceremony for the Davis...

Argentina's tennis player David Nalbandian celebrates after winning in the 2008 Davis Cup World Group quarterfinal match against Sweden's tennis...

Argentina's tennis player Juan Martin Del Potro (L) celebrates with teamamte David Nalbandian after he defeated by 6-4, 6-2, 6-1 Russia's tennis player Igor Andreev...

PARIS - OCTOBER 31: Andy Murray of Great Britain serves during his match against David Nalbandian of Argentina during the ATP Masters Series at the Palais Omnisports De Paris-Bercy on October...

...Series PARIS - OCTOBER 31: Andy Murray of Great Britain plays a backhand during his match against David Nalbandian of Argentina during the ATP Masters Series at the Palais Omnisports De Paris-Bercy on October...

PARIS - NOVEMBER 02: Jo-Wilfried Tsonga of France serves during the Singles Final against David Nalbandian of Argentina during the ATP Masters Series at the Palais Omnisports De Paris-Bercy on November...