Tallon Griekspoor upset top-seeded Jannik Sinner at the Shanghai Masters on hard court in the second round, claiming a 6–7, 7–5, 3–2 victory. Sinner entered as the overwhelming favourite at 1.02 odds, whilst Griekspoor sat at 14.04, making the Dutch player's comeback from a set down a significant upset. The match remained competitive throughout the opening set, which went to a tie-break before Griekspoor secured it. Sinner levelled in the second, but Griekspoor regrouped to take the decider and advance. The result marks a notable scalp for Griekspoor against one of the tour's leading players.