Dimitrov started his 2012 season by competing at the Hopman Cup alongside Tsvetana Pironkova. Their team was defeated by the Czech Republic 1–2, after they won a match in mixed doubles but lost their singles matches. Then, their team defeated Denmark 2–1. Against USA, Dimitrov dispatched Mardy Fish in straight sets in his first win (although not official ATP win) against a Top 10 player.