This market refers on the tennis match between Matteo Arnaldi and Quentin Halys in the Barcelona Open, Qualification, scheduled for April 11 at 9:00AM ET. This market will resolve to 'Matteo Arnaldi' if Matteo Arnaldi advances against Quentin Halys. This market will resolve to 'Quentin Halys' if Quentin Halys advances against Matteo Arnaldi. 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 ATP Tour. A consensus of credible reporting may also be used.