O’Sullivan Stunned in Belfast as Cheung Delivers First-Round Upset
Ronnie O’Sullivan suffered a first‑round exit at the Northern Ireland Open, losing 4‑3 to world‑ranked 110 Ka Wai Cheung in Belfast. The upset was part of a day where several top‑16 players, including Judd Trump, were also knocked out, highlighting the tournament’s unpredictable form.