Neither Alcaraz nor Sinner will be performing in Cincinnati.

Jannik Sinner, the world number one tennis player, underwent urgent medical examinations at a private orthopaedic clinic in Milan earlier this week, according to Italian journalist Gabriele Parpiglia. The incident has raised concerns among fans and observers ahead of the US Open, which begins on August 30 and runs through September 13. Sinner’s team reacted swiftly, with his physiotherapist reportedly interrupting their annual holiday to attend the evaluations. However, the exact reason behind Sinner's visit to the clinic remains unclear. While there is no official confirmation whether the examination was routine or related to a more serious injury, it is known that Sinner remained under additional tests while awaiting further information regarding his health status. The timing of the incident is particularly sensitive given the proximity to the US Open, with less than a month remaining before the tournament starts. If Sinner suffers from a severe injury, he would have limited time to recover and prepare for the competition in New York. Prior to this development, Sinner had been resting in Monaco after competing on hard courts and had also skipped the Montreal Masters, similar to Novak Djokovic. This situation adds uncertainty to the upcoming Grand Slam, especially considering the potential absence of another top player, Carlos Alcaraz, who is still recovering from an injury to his right wrist. Carlos Alcaraz, the second-ranked player in the world, withdrew from the Cincinnati Masters due to ongoing issues with his right wrist injury. He had been absent from three Masters tournaments, including Roland Garros and Wimbledon, since April when he pulled out of the Barcelona Open. His current absence from the Cincinnati Masters marks the fourth consecutive Masters event he will miss, extending his recovery period to nearly four months. This prolonged break has impacted his ranking, potentially allowing Alexander Zverev to reclaim the second position on the ATP rankings. Alcaraz last played in April during the Barcelona Open and had previously reached the final of the Monte Carlo Masters. This season, he has recorded 22 wins and only three losses, starting the year with a victory at the Australian Open, completing his career Grand Slam. However, the injury has disrupted his progress significantly. Although Alcaraz began training again at the end of July and completed his first session at his academy on August 31, the recent withdrawal from Cincinnati has intensified concerns about his readiness for the US Open. The uncertainty surrounding both Sinner and Alcaraz raises questions about the competitiveness of the US Open. With two of the top players potentially missing the tournament, the field could look very different compared to previous years. However, neither player has officially confirmed their injuries or their participation in New York. The outcome will depend on the results of further examinations and statements from their teams in the coming days. For now, the situation remains fluid, with fans and analysts waiting for more clarity on the health and availability of these key players for the upcoming Grand Slam.