England's Scott Mitchell suffered defeat in the 2018 British Darts Organisation (BDO) World Championship second round at the Lakeside Country Club.
Mitchell, the 2015 winner of the event in English village Frimley Green, was unable to overcome Belgium’s Andy Baetens.
The game began in closely fought fashion, with Mitchell coming from 2-0 down to level the contest.
He was unable to maintain his momentum, with Baetens eventually coming through the match as a 4-2 victor.
His success over fourth seeded Mitchell sees Baetens move into the quarter-finals of the competition, which will take place on Friday (January 12).
Tournament second seed Mark McGeeney also progressed to the last eight, with the Englishman beating last year's runner-up Danny Noppert.
Noppert had impressed in his first round match when he beat Wales’ Richie Edwards 3-0, having been a wildcard entry to the Championship.
He proved unable to replicate that level of performance in the best of seven sets match with McGeeney, as the second seed triumphed 4-1.
McGeeney awaits the winner of this evening’s match between Belgium’s Geert De Vos and Richard Veenstra of The Netherlands.
Elsewhere, defending champion Glen Durrant was in unstoppable form against fellow-Englishman Darryl Fitton as he progressed with ease to the third round, while another Englishman Scott Waites, a two-time winner, beat Dean Reynolds of Wales.
Durrant averaged 99.43, the highest of the tournament so far, in seeing off Fitton 4-1 to set up a last eight encounter with Jim Williams, of Wales, or England's Conan Whitehead.
Waites will now face Belgium's Andy Baetens in the quarter-finals having seen off Reynolds 4-2 with an impressive doubles conversation rate after only averaging 93.21 to Reynolds' 94.53.
Reynolds' compatriot Wayne Warren, averaging only 88.62, beat Dutch ace Willem Mandigers 4-2 in a less than impressive second round clash.
In the only women's match of the day, Lorraine Winstanley won 2-0 against Tricia Wright in an all-English showdown.