Rafael Nadal's ailing left knee may still bother him for a few more weeks, his coach said Monday.
Mardy Fish and John Isner have been chosen to play for the U.S. Davis Cup team in the quarterfinals against France on April 6-8.
The United States has taken a 2-1 lead over Chile in the first round of the Davis Cup on a doubles victory by Bob Bryan and Mike Bryan.
The United States has split its first-day Davis Cup matches against Chile, with Andy Roddick taking the opener and John Isner losing a five-set marathon to Paul Capdeville.
The U.S. Davis Cup team is still considered the favorite against Chile despite playing on a clay surface in the first-round Davis Cup series.
Chile is still planning to host its Davis Cup series this weekend against Israel despite the devastating earthquake that has killed at least 700 people in the South American country.
Top-seeded Juan Carlos Ferrero of Spain advanced to the quarterfinals of the Brazil Open, defeating Nicolas Massau of Chile 6-2, 5-7, 6-2.
Argentines Juan Monaco and Juan Ignacio Chela have advanced to the second round of the Movistar Open.
Boris Pashanski beat Nicolas Massu 6-2, 6-3 in one of only two matches completed at the rain-plagued Swedish Open.
Nicolas Massu of Chile, who won gold medals in singles and doubles at the 2004 Olympics, was among 12 players given special places Monday in singles at the 2008 event at Beijing.
Nicolas Massu rallied to beat fourth-seeded Sam Querrey 5-7, 6-4, 6-4 Wednesday and advance to the second round of the U.S. Men's Clay Court Championship.
Sixth-seeded Nicolas Almagro of Spain advanced to the Mexico Open quarterfinals, beating Italy's Filippo Volandri 6-3, 6-3.
Second-seeded David Ferrer defeated Nicolas Massu of Chile 6-3, 3-6, 6-3 Thursday to reach the quarterfinals of the Swedish Open.
Second-seeded Tomas Berdych of the Czech Republic beat Nicolas Massu of Chile 7-5, 6-1 Thursday to reach the BMW Open quarterfinals.
Fourth-seeded Juan Ignacio Chela advanced to the semifinals of the Mexican Open on Thursday, beating sixth-seeded Nicolas Massu 6-3, 6-7 (6), 7-5.
Peru's Luis Horna won the MoviStar Open on Sunday for his second ATP Tour title, beating hometown favorite Nicolas Massu 7-5, 6-3.