Sabalenka Overcomes Rakhimova: 6-3, 6-4 Win Hides a Fitness Warning Bell

New York, August 30, 2026 – The Arthur Ashe Stadium was still echoing with the roar of an unstoppable forehand. Aryna Sabalenka, the No. 1 seed, had just closed out the second set 6-4 against Kamilla Rakhimova, a player ranked outside the top 50. She raised her hand to the crowd, smiling brightly, but her eyes held a hint of fatigue. The set lasted 54 minutes – a small detail, but the first data point I noted in my book before leaving the stands. The context of the match was nothing unusual. Sabalenka, the two-time defending US Open champion, is chasing the first hat-trick of titles in her career. Rakhimova, 23, was rated far lower in class and experience. But tennis is never decided on paper. The first set ended 6-3 in 28 minutes, a pace so fast and smooth it felt like Sabalenka was playing a practice match. Her serve remained a devastating weapon, her return shots deep enough to push her opponent back. But in the second set, Rakhimova began to read the rhythm. She stood closer to the baseline, neutralizing the weight of the forehands by hitting the ball earlier, reducing Sabalenka's preparation time. This is where I started looking at physical statistics, not just the score. 54 minutes for a set from Sabalenka is an abnormal number. Her second-round match lasted 52 minutes total – an extremely short duration for a Grand Slam match. This discrepancy not only reflects Rakhimova's resistance but also reveals a reality: Sabalenka could not close out the set with her usual first-strike winners. The first-serve percentage may not have been published in the official results, but from the stands, I counted at least five double faults in the second set, a number higher than her season average. When the first serve doesn't land consistently, pressure shifts to extended rallies, where Rakhimova performed better than expected. This leads to a contrarian angle. A 6-3, 6-4 win sounds solid, but it is hiding a performance issue. I don't believe in accidents; I only believe in risks that haven't been charted. The risk here is not injury, as there are no signs of physical problems for Sabalenka. The risk lies in energy distribution. In the third round, when the opponents get stronger – like Diana Shnaider, the No. 15 seed, or Taylor Townsend – spending 54 minutes on a set against a player outside the top 50 becomes a cumulative burden. The body doesn't lie, but it always knows how to hide illness. A long set may not cause immediate injury, but it increases muscle fatigue and affects recovery between matches. For Sabalenka, the points pressure is a longer story. As champion, she must defend 2,000 points. Any loss before the final is a crack in her ranking wall. But what I care about more is how she handles extended sets. In round one, she won 6-1, 6-0. Round two, 6-2, 6-2. Round three, 6-3, 6-4. This trajectory is declining, not in score but in match duration. If this trend continues, she will face a 2-hour-30-minute match in the quarterfinals, where her opponent won't be Rakhimova but someone capable of exploiting fatigue. I recall the 2026 World Cup when I followed Neymar playing just 50 days after foot surgery. He increased his dribbles but his sprint speed dropped 8%. That data didn't predict the injury precisely, but it showed a clear biological decline. Sabalenka shows no such decline, but I'll be watching her first-serve percentage in the next match. If that number drops below 55%, it's a signal her body is compensating for an energy deficit. On another level, this match also exposed a reality about Rakhimova's level. She played better than her ranking, but that doesn't mean she's capable of causing an upset at a Grand Slam. Players like Rakhimova often have one good match against a big name, but they lack the tactical consistency to sustain their level over seven matches. Sabalenka, with her experience and composure, found a way through. But the bigger question is: can she maintain that dominance when the opponent is no longer a name outside the top 50? Tonight, I won't sleep easy with this win. I'll be recording the set duration metrics, the first-serve percentage, and the expressions on Sabalenka's face as she walked into the locker room. People save the highlights; I save the angle of the ankle bend in every sprint. And I'll watch her fourth-round match with a grounded caution. Three consecutive US Open titles would be a phenomenal achievement, but it will only happen if her body reads the warning signs before it's too late.