No. 3 Felix Auger-Aliassime Stunned at US Open: Karen Khachanov and the Lesson in Durability

I have witnessed many comebacks in my sports journalism career, from dramatic 1,500m races to breathtaking tiebreaks. But the match between Felix Auger-Aliassime and Karen Khachanov at the 2026 US Open last night still left me sitting in silence before my old laptop, wondering: what really happened to the world No. 3? The match began with Auger-Aliassime winning the first-set tiebreak 7-5. Everything seemed to be going according to script for a top seed. But then, like an electric shock, the momentum shifted completely. Khachanov, the 30-year-old Russian, won three consecutive sets 6-3, 6-2, 6-2, taking 18 of the 25 games after the first set. A collapse that defies comprehension. This is not the first time I have witnessed Auger-Aliassime struggling to maintain his level across five sets. But with his No. 3 world ranking and being the highest seed eliminated so far, this defeat raises bigger questions about the gap between his ranking and his Grand Slam results. Meanwhile, Khachanov - a former US Open semifinalist in 2026 and Paris Masters champion in 2026 - showed the composure of a player who has competed at the highest level. This event comes amid a series of major upsets at the 2026 US Open. Novak Djokovic, the No. 4 seed, lost in the first round - the first time in his illustrious career. Meanwhile, Zverev, the No. 1 seed, nearly became the first top seed to lose in the opening round since 2026, needing five grueling sets to overcome Sonego. Is this a sign of a generational shift, or simply the punishment of a demanding pre-tournament schedule? Reflecting on the match, I am reminded of my days running the 800m. There were races where I had full control in the first lap, but in the final 200m, my body seemed to stop listening. That feeling was not a lack of technique, but a physical and mental collapse. Auger-Aliassime appeared to experience something similar. Winning the first-set tiebreak may have created complacency, or Khachanov found a way to exploit his weaknesses - perhaps the backhand under pressure. What struck me most in this match was how Khachanov - an unseeded or lower-seeded player - showed his true class. His current ranking may not accurately reflect his ability on hard courts. This is a lesson about not underestimating players with the composure and experience of competing at the highest level. As for Auger-Aliassime, this is a wake-up call. His No. 3 ranking may have been built on impressive results at ATP 500 and 250 events, but Grand Slams remain the ultimate measure of class. When I saw him leave the court with a dejected face, I thought: perhaps it is time for a restructuring, not just tactically but also mentally. An empty stadium means applause moves into the heart; tennis becomes just a breath. And last night, Auger-Aliassime's breath was no longer steady. As Khachanov advanced to the next round, I saw a man running forward, not for titles, but for the durability of a career built on matches like this. The question for Auger-Aliassime is not whether he has enough talent, but whether he has enough durability to turn that talent into memorable September nights. Because, as I learned from my years running on the track, the fastest sprinter is not always the first to cross the finish line. Sometimes, the most important thing is knowing how to maintain your pace when everything is working against you.