Serbia have defeated Australia 2-1 in their Hopman Cup clash after winning the deciding mixed doubles in a match tiebreak.
Rising star Bernard Tomic beat world number one Novak Djokovic 6-4 6-4 to give Australia the perfect start to the tie, but 16-year-old Queenslander Ashleigh Barty suffered a 6-2 6-3 loss to Ana Ivanovic.
Serbia will secure a spot in Saturday's final if they can beat Germany on Friday
