This market refers on the tennis match between Tomas Machac and Stefanos Tsitsipas in the Australian Open ATP, scheduled for January 20 at 7:00PM ET. This market will resolve to 'Machac' if Tomas Machac advances against Stefanos Tsitsipas. This market will resolve to 'Tsitsipas' if Stefanos Tsitsipas advances against Tomas Machac. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the Australian Open. A consensus of credible reporting may also be used.