England's world lightweight champion Terri Harper cruised past the overmatched Natalie Zimmermann to defend her WBO title in front of a spirited home crowd in Doncaster.
The 28-year-old dominated from the opening bell, picking her opponent apart without ever really threatening the stoppage.
German Zimmermann, 42, became a sitting target and ended the fight badly bloodied because of a clash of heads at the Eco-Power Stadium.
All three judges scored it 99-91 as three-weight world champion Harper extended her record to 16 wins, with two defeats and two losses.
Afterwards, Doncaster's Harper called for a unification fight with fellow Briton and WBC lightweight champion Caroline Dubois.
"That gets my fire burning. I said it the other day in the press conference, she rubs me up the wrong way," Harper said.
