At the 2013 Hopman Cup Tomic defeated Tommy Haas, World No. 1 Novak Djokovic and Andreas Seppi. Tomic's first official tournament for the year was the Apia International in Sydney. He defeated compatriot Marinko Matosevic, fifth seed Florian Mayer, defending champion Jarkko Nieminen and Andreas Seppi in the semifinals to reach his first career singles final where he defeated Kevin Anderson in three sets to win his maiden ATP title. At the 2013 Australian Open, Tomic defeated Leonardo Mayer and Daniel Brands to reach the third round where he lost to world No. 2 Roger Federer in straight sets.