WASHINGTON (AP) — 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.

Emma Raducanu picked up her best win by ranking since May, ousting No. 7 seed Marta Kostyuk in the opening round of the ...