Juan Martin del Potro said he will not play in Argentina's Davis Cup playoff tie in September due to his differences with the Argentine Tennis Association.
World number one Rafael Nadal will play in the Buenos Aires ATP tournament in February for the first time since 2005.
Novak Djokovic has beaten Rafael Nadal again, less than two weeks after his triumph at the ATP Tour Finals in London.
Juan Martin del Potro has declined to play in Argentina's Davis Cup tie against Italy next year.
Former Wimbledon finalist David Nalbandian has announced that he will retire from tennis next month.
Argentina came from a set down to upset France in the doubles and take a 2-1 lead in their Davis Cup quarter-final.
Round-up: Sam Querrey drew the US level with Serbia while Davis Cup holders Czech Republic took a 2-0 lead over Kazakhstan.
Richard Gasquet has been replaced by Gilles Simon in the France team to face Argentina in this weekend's Davis Cup quarters.
Rafael Nadal continued his return to action with a 6-2 6-2 win over Diego Schwartzman iat the Acapulco International.
World number four David Ferrer retained his Buenos Aires Open title with a 6-4 3-6 6-1 win over Stanislas Wawrinka on Sunday.
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