Overview

• Katie Boulter lost 6-4, 6-4 to No. 27 seed Marta Kostyuk and will fall outside the world’s top 50, ending her US Open in the first round.
• Boulter said her serve needs fixing after eight double faults and signaled openness to bringing in outside technical help, citing Coco Gauff’s recent biomechanics move.
• She acknowledged feeling burnt out after traveling straight from Wimbledon to the U.S., though she described her current mindset as improved.
• Sonay Kartal was beaten 6-3, 1-6, 6-1 by No. 18 seed Beatriz Haddad Maia in a third set marred by severe cramp, with both players struggling physically.
• Kartal said she will review hydration and nutrition after the episode, while a joking remark from Martina Navratilova about Boulter’s future drew additional media attention.