US Open 2026 Day 9: Swiatek searches for her mojo while the young wave demands the spotlight

The US Open 2026 has reached day nine with several must-watch matchups. On Louis Armstrong Stadium, Mirra Andreeva faces Anastasia Potapova. Andreeva brings a high-risk, high-reward baseline game that has been grooved into a reliable pattern. Potapova has clay-court experience and has beaten top players. This contest is not just about forehand pace or powerful serving; it is a test of who can hold their tactical choices in decisive games. Iga Swiatek, the 2026 US Open champion, did not lose a set in that year's tournament. But she has mislaid her mojo recently. Her opponent is Qinwen Zheng, who just fought back from 0-5 and is full of confidence. Zheng is no longer an easy player to drag into Swiatek's rhythm. She knows how to extend rallies and wait for errors. Swiatek needs to regain control from the very first service games, or the pressure will quickly shift to her side. In the men's draw, Alexander Blockx, 21, showed composure when he came from a set down to beat Cobolli. Francisco Cerundolo is an experienced opponent, but if Blockx stays calm, he can create an upset. Arthur Gea, another young talent, shocked people in Melbourne and now meets Botic van der Zandschulp, a player with a giant serve. Van der Zandschulp can win easy service games, but Gea moves well and reads the game smartly. Karen Khachanov plays with overwhelming power but lacks finesse and agility. Learner Tien, by contrast, has great feel and foot speed. On the New York hard courts, their match is a duel between strength and skill. It is not easy to pick a winner because each possesses a weapon that can change the match. Overall, day nine at this year's US Open is full of unpredictable matches. The wave of young players like Blockx, Gea and Tien is challenging the established generation. Fans should expect tense tie-breaks, bold down-the-line winners, and moments where emotion overrides tactics. Watch how they handle the big points; that is where preparation and character are revealed.