Seventeen-time Grand Slam winner Federer could possibly be playing in Australia for the last time if he decides to call an end to his glittering career at the end of 2014.
The 32-year-old former world number one slipped to number six in the rankings at the end of 2013 following a mid-season back injury and a series of disappointing results, particularly in the Grand Slams.
Federer then suffered a shock second round loss to world number 116 Sergiy Stakhovsky at Wimbledon before bowing out in the fourth round of the US Open to Spaniard Tommy Robredo.
He won just one title in 2013, and failed to make a major final for the first time since 2002.
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However, Federer warned against writing him off, saying the recent appointment of Stefan Edberg to his coaching staff was an indication he still had the desire to compete at the top level.
"I still have a lot to do. Considering everything, I finished the season sixth, which was unbelievable.
"I always had a good perspective for things and it's why, as crazy as it sounds, I enjoyed the year considering the setbacks I had -- I wanted to find a way out of it."
Federer's main challenges in Brisbane will come from Japanese star Kei Nishikori, the world number 17, and Frenchman Gilles Simon, ranked two places lower at 19.