Stanislas Wawrinka of Switzerland gestures as he argues a line call with the chair umpire during his second round match against Alejandro Falla of Colombia at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 15, 2014.(AP Photo/Eugene Hoshiko)

Australian Open Tennis

Stanislas Wawrinka of Switzerland gestures as he argues a line call with the chair umpire during his second round match against Alejandro Falla of Colombia at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 15, 2014.(AP Photo/Eugene Hoshiko)

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