Overview
- Jannik Sinner announced he would miss the US Open after on‑court testing in Monte Carlo showed he still needed time to recover and he withdrew on Aug. 21.
- Italian media and multiple reports say the world No. 1 has extra‑articular tendinous inflammation in his right knee, meaning the problem lies in tissues around the joint rather than the meniscus, cartilage or major ligaments.
- Sinner has been receiving conservative care, including shockwave therapy and physiotherapy at JMedical in Turin, and his team reports no sign that surgery is required.
- Medical timelines in the coverage place a likely progression back to full practice by late September and a competitive return aimed at the Asian hard‑court swing, with the China Open and Shanghai as the primary targets.
- The decision follows a season of highs and warning signs — a Wimbledon title in July and prior episodes of cramping and dizziness — and it shifts tournament seeding and opportunities while protecting Sinner’s long‑term form and ranking lead.