Seven-time world champion Ronnie O'Sullivan, world number one Zhao Xintong and defending champion Mark Williams were knocked out on the opening day of the Shenzhen Open. China's Jiang Jun, ranked 64th, took the opening two frames before O'Sullivan levelled with breaks of 92 and 52. Jiang then reeled off three frames, sealing a 5-2 win with a break of 108 to set up a meeting with Englishman Zak Surety.

Scott Donaldson stunned 2025 world champion Zhao by winning a final-frame decider. Donaldson, ranked 65 places below Zhao, compiled breaks of 77, 105, 50 and 62 as he came from 3-2 down. He will face China's Pang Junxu in round three. Williams lost 5-4 to China's Fan Zhengyi after fouling on the final pink.

England's Judd Trump cruised to a 5-0 win over China's Huang Jiahao and advances to the last 16 after Anthony McGill withdrew on medical grounds. Australia's Neil Robertson beat China's Liu Hongyu 5-2, England's Chris Wakelin beat Wales' Liam Davies 5-3, and China's Si Jiahui beat England's Oliver Lines 5-1. Belgium's Ben Mertens progressed after Northern Ireland's Mark Allen withdrew for personal reasons.