Overview

• Shapovalov defaulted after arguing with a fan and receiving a code violation.
• Shelton was leading the match and had three match points when the incident occurred.
• Shapovalov forfeits $53,420 in prize money and 100 ATP ranking points.
• Shelton will face Flavio Cobolli in the DC Open semifinals.
• The match ended abruptly, leaving fans and players in disbelief.