Jannik Sinner announced on October 6 that he was ending his 2026 season early to receive treatment on his right knee, VnExpress reported. The Italian said the decision was made with his medical team, with full recovery and his long-term career taking priority. He will miss the ATP Finals and other remaining events. His inability to defend ranking points gives Alexander Zverev an opportunity to challenge for No. 1, but any change still depends on subsequent results. The announcement did not establish a confirmed return date.