At only 19, Bernard Tomic is making a few waves on the tennis scene. Rising up to No. 37 in the rankings after his semifinal loss at Brisbane, Tomic is an unseeded player to avoid. The youngest ever junior boys Australian Open winner will have the home-crowd advantage. Last year's Wimbledon run really exposed Tomic to the world, and he looks like he has the potential to win a grand slam.
In his last Australian Open, he knocked out seeded Feliciano Lopez before losing in straight sets to Nadal. Tomic has a good record for a nineteen-year-old against the top 10 with two wins and six losses.
His unorthodox style could cause Murray a bit of worry early on, but Murray will eventually dismiss him fairly easily. Tomic would likely not be anything more than a tough ride for Murray than a definite threat.
Another player to avoid: Philipp Kohlschreiber. This German is always a handful for big players at Slams.