By Matt Cronin CARLSBAD, California, July 29 (Reuters) – After a rough past couple of months that included a tight loss to Maria Sharapova at the French Open and an injury-enforced withdrawal from Wimbledon, world number three Victoria Azarenka enters the Southern California Open as hungry as ever. Australian Open champion Azarenka has not played since she was forced out of Wimbledon prior to her second round match against Flavia Pennetta after falling in the first round where she injured her knee and hip. …