Overview

• Sinner justified bringing back former coach Umberto Ferrara after a 6-0, 6-2 quarterfinal win in Cincinnati, saying Ferrara understands his physical needs best.
• Ferrara had been dismissed last year following two low-level clostebol positives linked to accidental contamination but faced no personal sanction from the ITIA.
• Sinner accepted a 90-day suspension earlier in 2025 under a settlement between WADA and the ITIA over inadvertent transdermal contamination from an over-the-counter spray.
• During Ferrara’s absence, Sinner worked with Marco Panichi and Ulises Badio and still won the Australian Open, reached the French Open final and captured Wimbledon.
• His ongoing 25-match hard-court winning streak underscores the tension between optimizing performance and questions over entourage responsibility ahead of the US Open.