Stephen Bunting failed to hit the heights of Wednesday but was still good enough to book his place in the semi-finals of the World Darts Championship at Lakeside.
The top seed averaged 100 on Wednesday - the first BDO century average since 2008 - but dropped to 91 on Thursday.
He was still far too good for Rick Hofstra, though, and moved through 5-2.
Joining him in the semis is Robbie Green, who beat Tony Eccles by the same scoreline.
The afternoon session saw the second round matches wrapped up, with Jan Dekker a 4-2 winner against Geert de Vos and former champion Martin Adams a 4-1 victor against Ross Montgomery.