Description:Top seeds Serbia moved a step closer to the final of the Hopman Cup with a 2-1 victory over Australia on Wednesday (January 2). Bernard Tomic gave the host nation the lead when he upset world number one Novak Djokovic 6-4 6-4 before former women's world number one Ana Ivanovic levelled the tie with a comprehensive 6-2 6-3 over 16-year-old Ashleigh Barty.(1:29)