"Last year I had some difficulties but now I am working hard to keep up my fitness," said the Belarusian 24-year-old before the exhibition match.
Azarenka, a two-time Australian Open champion who ended 2013 with just three titles, said she was hoping for a victory in the Land of Smiles to bring her good luck again in Melbourne.
"I won this exhibition match for two consecutive years and went on to win the Australian Open which is very good," she told reporters in the seaside resort of Hua Hin.
Serena, 32, ended 2013 with 11 titles while triumphs at the French and US Opens took her grand slam haul to 17.
She enjoyed a match record of 78 wins against just four defeats, claimed the season-ending WTA Championships title and became the oldest number one player.
Asked what would be her next challenge, Serena said, "I just want to enjoy playing tennis. For me, it is the challenge every day. I enjoy playing tennis and am happy to play."
Azarenka has won just three of her 16 meetings against Williams, although she split their four clashes in 2013 and for a second successive season took her great rival to three sets in the US Open final.
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