MELBOURNE, Oct 8 (Reuters) - Defending champion Carlos Alcaraz will lead the lineup for the AO 1 Point Slam, alongside Jannik Sinner, Coco Gauff, and Naomi Osaka, as top players face off against amateurs for a chance to win a million dollars ahead of the Australian Open. The event, scheduled for the opening week of the tournament, features a knockout format where players are determined by 'Rock, Paper, Scissors' to decide who serves or receives, with just one point needed to advance.