'" Querrey said. "He was just like always super inquisitive, so I'm glad to see it's paying off."
Major moment: McDonald takes 3rd-ranked Dimitrov to 5 sets →
"I never once thought about that this whole tournament or that match out there tonight," he said. "I don't feel any extra pressure."
Querrey gives US 1st US Open men's quarterfinalist since '11 →