Serena, left, and her sister Venus Williams of the U.S. celebrate after their doubles match against Dominika Cibulkova of Slovakia and Anastasia Pavlyuchenkova of Russia at the All England Lawn Tennis Championships at Wimbledon, Saturday, June 26, 2010. (AP Photo/Sang Tan)
April 27, 2012 7:37:01 AM PDT
by NEKESA MUMBI MOODY Associated Press
NEW YORK - April 27, 2012 --
Serena Williams says altering her diet in support of big sister Venus hasn't been much of a hardship.