US Open quarter-final ends suddenly as star announces immediate retirement on court

The US Open quarter-final match between Karen Khachanov and Alexander Blockx ended abruptly when Blockx announced his immediate retirement while on the court. The match reached the third set before the No. 28 seed decided he could no longer continue. As a result of this sudden retirement, the unseeded Russian player Karen Khachanov has officially advanced to the semi-finals of the tournament. The retirement occurred during the later stages of the competition, specifically during the quarter-final round of the 2026 US Open event. Coverage of the event has been widespread across major sports and news platforms.

ESPN and Reuters both reported that Khachanov is moving on to the semi-finals following the retirement of Blockx. Yahoo Sports provided additional detail regarding the rankings and the timing of the exit, noting that Khachanov is unseeded while Blockx entered the tournament as the No. 28 seed. The Daily Express characterized the end of the quarter-final as sudden, focusing on the immediate nature of the on-court announcement that stopped the match in its tracks. Context for the retirement was provided directly by the athlete via usopen.org. Alexander Blockx spoke regarding the decision to retire during the 2026 US Open quarter-final, stating that the situation just kept getting worse.

Yahoo Sports further elaborated on the physical state of the No. 28 seed, describing him as hobbled during the proceedings. This physical decline culminated in the third set, leading to the decision to stop play and concede the match to Khachanov, who now secures a spot in the next round of the tournament. Looking forward, the focus shifts to Karen Khachanov as he prepares for the US Open semi-finals. Having advanced through the quarter-final round without completing the third set against Blockx, Khachanov will now compete for a place in the final. Further updates will likely center on the health status of Alexander Blockx following his mid-match retirement and the subsequent match scheduling for the remaining semi-finalists in the men's draw at the US Open.