The second round kicked off at the 2025 Australian Open, and it was a busy day, with Coco Gauff, Novak Djokovic, Carlos Alcaraz, and Aryna Sabalenka all advancing. Here's how the action panned out.
Australian Open Day 4: live updates, schedules, highlights and more
Nick Kyrgios hints at retirement after Australian Open defeat (2:02)
Nick Kyrgios hints that he won't return to play singles at the Australian Open, yet insists he has "no regrets" after his first-round defeat. (2:02)