If the first set was supposed to be a straightforward opening act for Madison Keys, Alina Korneeva had other ideas. The 19-year-old Russian, making her US Open main draw debut, did not just hang around against the 2025 Australian Open champion — she forced the match into a tighter, more fragile shape than the ranking gap might have suggested.
Keys led 3-0 early, and then 5-3 later in the set, but Korneeva broke back and kept the pressure on. By the live update, she was serving at 4-5 to stay in the set. That sequence tells the story better than the score alone: Keys had control, but not complete control, and Korneeva showed enough resistance to turn a routine first round into a live test.
Why this first set mattered
The most important detail here is not simply that Korneeva won games. It is that she made Keys work for every phase of the set. A player making a main draw debut can sometimes look overwhelmed by pace, occasion and name value, especially on a stage like Arthur Ashe. Korneeva, though, found a way back after falling behind, and that suggests a level of competitiveness that can travel beyond one match.
For Keys, the opening set still looked like the kind of match a major champion should expect to manage. But the fact that Korneeva broke back after trailing 5-3 changes the texture of the contest. It is one thing to win a set comfortably. It is another to have to keep reasserting yourself against a teenager seeing the moment rather than shrinking from it.
The broader live picture
The Korneeva-Keys match was part of a busy live US Open 2026 session. Rain delayed play on the non-covered courts for at least another 30 minutes, adding another layer of uncertainty to a day already defined by movement and interruption. Elsewhere, Thanasi Kokkinakis withdrew before his singles match against Rafael Jodar, with Bu Yunchaokete replacing him in the draw.
That combination of delays, withdrawals and a tense first-round battle is a good reminder that the US Open often starts with as much disruption as certainty. Korneeva’s performance fits that theme. She did not arrive as the favorite, and she did not need to win the set for the point to land. She only needed to show that a 19-year-old debutant could make a major champion feel the match.
That is exactly what she did.
