...Rafael Nadal returns the ball to Spanish Rafael Nadal returns the ball to his Argentinian opponent Juan Ignacio Chela during their Monte Carlo ATP Masters Series tournament tennis match, on April 15, 2009 in Monaco...

17 Jan 2002: Pete Sampras of the USA in action against Juan Ignacio Chela of Argentina during the Australian Open 2002 Tennis Championship at Melbourne Park, Melbourne Australia

...Charleston, S.C., on Sunday, April 20, 2008. Rafael Nadal of Spain celebrates his victory over Juan Ignacio Chela of Argentina during a Open tennis quarter finals match in Barcelona, Spain, Friday, May 2, 2008...

Serbia's Novak Djokovic reacts during his quarter final match against Argentina's Juan Ignacio Chela of the BA-CA tennis trophy in Vienna, on Friday, Oct, 12, 2007. (AP Photo/Hans...

David Ferrer (pictured) had lost both of his previous matches against Juan Ignacio Chela

Juan Ignacio Chela survived a fifth set to reach the fourth round and will play Stanislas Wawrinka for a...

Britain's Greg Rusedski plays a shot in the match against Argentina's Juan Ignacio Chela during the Sydney International tennis tournament in Sydney, Australia on Monday

Andy Roddick beat Juan Ignacio Chela 5-7, 6-4, 6-4, 6-4

Paradorn Srichaphan of Thailand reacts after defeating Juan Ignacio Chela 5-7, 6-2, 6-2 to win the TD Waterhouse Cup in Commack, N.Y...

...break since Wimbledon, Marat Safin came back strong with a 6-4, 6-3 victory over Juan Ignacio Chela