Alex De Minaur defeated the World no.1 6-4, 6-4 to give the host nation a 1-0 lead in their quarter-final tie against Serbia at the mixed teams event. Novak was broken once in each set, suffering his first defeat on Australian soil after six years and 43 consecutive wins.

Marketa Vondrousova earned a close win for the Czech Republic in the opening match of the day, when she beat Olga Danilovic 6-1, 3-6, 6-3. Novak then outplayed Jiri Lehecka 6-1, 6-7, 6-1 to even the tie. In the deciding mixed doubles match, Olga teamed with Hamad Medjedovic. The Serbian duo defeated Miriam Kolodziejova and Petr Nouza 4-6, 7-5, 10-8 to send their Team through to the United Cup quarterfinals.

In his first official match of the 2024 ATP season, Novak eased past Zhizhen Zhang 6-3, 6-2 to give Serbia a 1-0 lead in Group E clash with China in Perth. In the second match, Qinwen Zheng defeated Olga Danilovic 6-4, 6-2. Nole and Olga won a deciding mixed doubles rubber 6-4, 1-6, 10-6 to keep Serbia in contention for quarter-finals.