Overview

• US Open officials removed Jannik Sinner and partner Kateřina Siniaková from the 16-team mixed-doubles draw a day after Sinner retired ill in the Cincinnati final against Carlos Alcaraz.
• Their slot was filled by Americans Danielle Collins and Christian Harrison under the tournament rule that inserts alternates with the highest combined singles ranking.
• The reworked mixed-doubles competition runs Aug. 19–20 at Flushing Meadows, features short-set formats, and awards $1 million to the champions.
• Players and doubles specialists criticized the compressed schedule and prize-driven revamp, citing late withdrawals and last-minute pairings that complicated preparation.
• Sinner said he will take a few days to recover and intends to play the US Open singles, which begins Sunday.