Question: who won atp tennis today?
Answer: Novak Djokovic inspired Serbia to victory in the inaugural ATP Cup as his singles win over Rafael Nadal helped his country beat Spain 2-1 in Sydney. World number two Djokovic, 32, defeated top-ranked Nadal, 33, 6-2 7-6 (7-4) to level the tie after Roberto Bautista Agut beat Dusan Lajovic 7-5 6-1.