The 2009 Brisbane International was a professional tennis tournament played on outdoor hard courts in Brisbane, Queensland. It was the first edition of the event known as the Brisbane International and resulted from the merger of the Next Generation Adelaide International on the men's tour with the Mondial Australian Women's Hardcourts on the women's tour. The 2009 Brisbane International was a World Tour 250 series event on the ATP Tour and an International series event on the WTA Tour. Both the men's and women's events took place at the Queensland Tennis Centre in Tennyson from 4 January through 11 January 2009.
The men's draw was led by Novak Djokovic, who was the World No. 3 ranked player, 2008 Australian Open champion, 2008 Pacific Life Open champion, and 2008 Tennis Masters Cup winner. Joining Djokovic in the tournament was Jo-Wilfried Tsonga, who was the 2008 Australian Open runner-up and the 2008 champion of the tournament in Bangkok and the Masters Series tournament in Paris. Fernando Verdasco, a member of Spain's 2008 Davis Cup championship team and the winner of the tournament in Umag, also played in Adelaide. Also lined up for this tournament were Lyon titlist Robin Söderling, Tokyo winner Tomáš Berdych, Mardy Fish, Richard Gasquet, and Radek Štěpánek.
The women's field featured Ana Ivanović, the World No. 5 ranked player, a former World No. 1, 2008 Australian Open runner-up, and champion of the 2008 French Open and 2008 Pacific Life Open. Joining Ivanović in the tournament was Victoria Azarenka, who won the 2008 Generali Ladies Linz tournament late last year and was the runner-up at the 2008 Gold Coast tournament and the 2008 Prague Open tournament. Also present were Marion Bartoli, the runner-up at the 2008 tournament in Stanford; Daniela Hantuchová, 2008 Australian Open semifinalist; Amélie Mauresmo, a former World No. 1, champion of the 2008 tournament in Cincinnati, and semifinalist at the 2008 tournament in New Haven, Connecticut; World No. 26 Kaia Kanepi; and World No. 30 Francesca Schiavone. The seventh seed, Maria Kirilenko, had to withdraw because of a viral illness.