Bu absolutely dismantled Tsitsipas through pure defensive mastery! The Greek star gifted away 33 unforced errors while the Chinese warrior Bu stayed ice-cold with just 11. This wasn't about flashy winners - Bu turned Tsitsipas into his own worst enemy. Watching the top seed crumble under pressure from a 76th-ranked player was pure tennis poetry. Bu's patient baseline grinding exposed every crack in Tsitsipas' game. What a clinic in mental toughness! Did anyone else see this defensive masterclass coming? #Sports #TennisUpset #WinstonSalem