Sunday’s fourth round produced a full changing of the guard, with Alcaraz, Tiafoe, Shelton, and Michelsen all booking their quarterfinal spots at the expense of Paul, Medvedev, Tsitsipas, and Etcheverry. Now the spotlight shifts to Monday, where Zverev, Cerundolo, and Tien headline the final round of 16 matches that will complete the men’s quarterfinal picture.

• Medvedev fell despite leading 6 to 5 in the third set tiebreak. Tiafoe closed out the match with quick volleys at the net.
• Michelsen became the first unseeded man this century to reach the US Open quarterfinals without dropping a set.
• Alcaraz looked increasingly confident following his return from the wrist injury. It was his best match since coming back.

Francisco Cerundolo vs Alexander Blockx – click to read more

A. Blockx is the definitive choice to win this matchup. Backed by an 80% recent win rate and a superior 68% hard-court record in 2026, A. Blockx will exploit F. Cerundolo’s lower hard-court efficiency and physical weariness. Having already defeated F. Cerundolo in Madrid earlier this year, A. Blockx will establish his authority early, handle the return games with ease, and secure a decisive victory to advance.

Alexander Zverev vs Luciano Darderi – click to read more

This matchup is defined by surface suitability. Luciano Darderi is an exceptional clay-court player, but his lack of weapons on hard courts is a liability against elite opposition. Alexander Zverev is too experienced, serves too big, and possesses far superior movement on hardcourts to let the Italian establish any rhythm. Alexander Zverev will control this match from the baseline, exploit Luciano Darderi’s defensive positioning, and secure a comfortable victory in straight sets, comfortably staying under the total games line of 33.5.

Karen Khachanov vs Learner Tien – click to read more

L. Tien is the superior player in this matchup. With a world ranking of 15 and an exceptional 80% win rate, Tien has the tactical consistency and baseline precision to neutralize K. Khachanov’s power. Khachanov’s historical struggles on hard courts, combined with his lower ranking of 50, will prove decisive. Tien will dictate the tempo of the rallies, exploit Khachanov’s movement, and secure a convincing victory. Expect Tien to win the match and the total games to stay under 38.5.