The 20-year-old, who has lost each of his past three meetings with the world number two, goes into the contest in fine form, having won 10 consecutive singles matches.
"What a match it is," said Tomic. "10 out of 10 now with matches. I feel so confident. This is the perfect time to play him.
"I've got a good attitude to win. I've beaten a lot of good players over the last past two weeks, especially Novak [Djokovic at the Hopman Cup].
"I think I can do it - I'm ready. I mean, I'm not going to say I don't have the belief. I do have the belief now. It's possible. I showed that in Perth, that you can beat these players. Now I'm going to try to beat him."
Tomic is ranked 43rd in the ATP world rankings.