The 2018 Australian Open wildcard playoffs and entries are a group of events and internal selections to choose the eight men and eight women singles wildcard entries for the 2018 Australian Open, as well as seven male and seven female doubles teams plus eight mixed-doubles teams.
The Asia-Pacific Australian Open Wildcard Play-off featured 16-players in the men's and women's singles draws and took place from 29 November to 3 December 2017 at Hengqin International Tennis Centre in Zhuhai, China.
The December Showdown is held annually for two weeks in December. The Showdown includes age championships for 12/u, 14/u, 16/u and 18/u age categories. It also hosts the 2018 Australian Wildcard Playoff which will be held from 11–17 December 2017 at Melbourne Park, offering a main draw singles wildcard for men and women and a main draw women's doubles wildcard. The winner of the girls' 18/u championship will also be given a main draw wildcard into the 2018 Australian Open.
^ abTaylor Townsend was the original winner for the US Wildcard Playoff Challenge. When she was directly entered into the main draw, Townsend was ineligible to place the Wildcard entry and therefore it was given to the runner-up, Kristie Ahn.
^Victoria Azarenka originally received the Wildcard as she later withdrew due to family reasons, Ajla Tomljanović took her place in the Wildcard spot.