Former champion Caroline Wozniacki has been awarded a wildcard for next month's Australian Open.
Wozniacki reached the US Open fourth round in September on her Grand Slam comeback, losing to eventual winner Coco Gauff.
The Australian Open at Melbourne Park starts on 14 January.
The tournament has been extended to 15 days for the first time in an attempt to reduce the number of late-night finishes.
Andy Murray, Rafael Nadal, Naomi Osaka, Aryna Sabalenka and Elena Rybakina are among the nine Grand Slam champions who will compete at the Brisbane International from 31 December to 7 January.