Tristan Vanech, 14, and dad Bob Vanech of Venice, Calif., said their rankings led to a father-son match Sunday, the second day of the tournament at the Hotel InterContinental in Addison, The Dallas Morning News reported Monday.
"There was a genuine parenting moment where I thought, 'I can't beat him,'" Bob Vanech said. "But then I also didn't want my score lowered by losing."
"Maybe I got too cocky," Tristan said after losing to his father, who played "defeated" as his final word.
The tournament is scheduled to crown its $10,000 winner Wednesday.