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Andy Murray kicked off 2013 with a successful defense of his Brisbane International title, holding off the up-and-coming Bulgarian Grigor Dimitrov 7-6 (0), 6-4 in Sunday's final.

The 21-year-old Dimitrov raced to a 4-1 lead in his first ATP World Tour final, stunning Murray with some impressive single-handed backhands, but lost his nerve and was broken when serving for the set at 5-3. After getting back on serve, No. 3-ranked Murray saved a set-point with an ace and forced a tiebreaker, which he dominated.

Murray began his breakthrough season in 2012 by winning in Brisbane and followed that up later with career-changing titles at the London Olympics and U.S. Open.

He heads into the Australian Open, starting Jan. 14, as the reigning major champion.