The 2019 Australian Open was a Grand Slam tennis tournament that took place at Melbourne Park from 14 to 27 January 2019.

Roger Federer and Caroline Wozniacki were the defending men's and women's singles champions, but were unsuccessful in their respective title defenses; Federer lost to Stefanos Tsitsipas in the fourth round and Wozniacki lost to Maria Sharapova in the third round.

[4][5] Naomi Osaka of Japan defeated Petra Kvitová of the Czech Republic in three sets to win the women's singles title.

There were singles and doubles events for both boys and girls (players under 18), which are part of the Grade A category of tournaments.

There were also singles, doubles and quad events for men's and women's wheelchair tennis players as part of the NEC tour under the Grand Slam category.

[7] Katie Boulter and Ekaterina Makarova were the first players in a main draw to compete in the new tie-break format.

Initially, the broadcast deal was to have started from 2020, however, the Seven Network, which had previously televised the event between 1973 and 2018, agreed to relinquish the rights to the 2019 tournament.