Suljovic won the first set in style as he hit an incredible amount of six 180's in the first set, winning it 3-1.
Searle, however, hit back with a 120-finish in set two in the process of levelling up the match at 1 set apiece. Set three also went to the Englishman as Suljovic was pushed to the brink of defeat.
'The Gentle' did all he could in set four, but it would prove to be not enough as Searle checked out 118 to complete a memorable shock.
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World Darts Championship, including schedules and the prize fund breakdown.
2018/2019 William Hill World Darts Championship
Thursday December 20
Evening Session (1900)
Cristo Reyes (89.30) 3-2 (85.28) Rowby-John Rodriguez (R2, 2-3, 2-3, 3-0, 3-2, 3-0)
Mervyn King (97.76) 3-2 (87.56) Jan Dekker (R2, 3-2, 3-0, 2-3, 2-3, 4-2)
Adrian Lewis (97.20) 3-0 (95.92) Ted Evetts (R2, 3-2, 3-2, 3-1)
Mensur Suljovic (90.83) 1-3 (90.66)
Ryan Searle (R2, 3-1, 1-3, 1-3, 1-3)
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