Emma Raducanu, an 18-year-old British qualifier, is living a US Open dream as astonishing as anything one might see down the road on Broadway.

Raducanu, ranked 150th, became the first qualifier to reach the US Open women's semi-finals on Wednesday by defeating Swiss 11th seed Belinda Bencic, the Tokyo Olympic champion, 6-3, 6-4 at Arthur Ashe Stadium.