All eyes will be on Belgian comeback queens Justine Henin and Kim Clijsters when the second Brisbane International tennis tournament begins tomorrow.

Former world number one Henin is using the Brisbane tournament to launch her return to professional tennis, while Clijsters will be out to maintain the momentum of her 2009 comeback, which breathed new life into the women's professional tour thanks to her win at the US Open in August.

With the tournament also featuring Serbia's glamourous Ana Ivanovic and Russian Nadia Petrova, the women have garnered almost all the attention despite the presence in the men's draw of top quality players such as Andy Roddick and Gael Monfils.

The 27-year-old Henin sent an ominous warning to her rivals when she arrived in Brisbane claiming she would become a better player than when she retired in May 2008.

She announced her comeback in September, soon after her compatriot and fierce rival Clijsters won the US Open, and said she would return to the tour a more relaxed player.

Clijsters's manager said the world number 18's priority in Brisbane was introducing daughter Jada to a koala.

Another former world number one, Ivanovic, will be hoping the tournament marks her return to the top flight after a loss of form and a run of injuries saw her ranking fall to 22.

Ivanovic, already a crowd favourite in Australia because of the country's large Serbian community, has endeared herself to locals even further thanks to her relationship with Queensland golfer Adam Scott, with newspapers renaming her "Aussie Ana".

The men's draw is headed by Roddick, Monfils, and Czech duo Radek Stepanek and Tomas Berdych.

The tournament also features Frenchman Richard Gasquet, who was given the all-clear from the Court of Arbitration for Sport to play in Australia following a three-month ban for cocaine use.