Oxfordshire's Deta Hedman battled past old rival Trina Gulliver, the nine-time world champion, 4-2 in the BDO World Trophy first round at EventCity, Manchester.
The Dark Destroyer, fresh from winning her fifth Scottish Open title with a 5-4 victory over Fallon Sherrock in the final at Renfrew, now faces Rachel Brooks in the last eight.
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