WASHINGTON — Emma Raducanu handed No. 7 seed Marta Kostyuk a sixth consecutive loss Tuesday, defeating her 7-6 (4), 6-4 at the DC Open to prolong a slide that now has lasted more than two months ...

Kostyuk's victory puts the 19-year-old into her third semifinal of the season, following Abu Dhabi in January and Istanbul in April. She will bid to reach her maiden final against Halep, to whom she ...