Luka Dončić experienced a significant defensive lapse during a crucial moment in a tie game against the Utah Jazz, allowing John Collins to score an easy dunk. Despite his impressive offensive performance, scoring 37 points with nine assists and seven rebounds, Dončić took the blame for the miscommunication that led to the defensive breakdown. His focus on another player left Collins unguarded, underscoring a frustrating aspect of his game. This incident highlights the ongoing challenge of balancing his offensive brilliance with defensive responsibilities, contributing to the Mavericks' disappointing start to the season at 5-7 after their recent NBA Finals appearance.