WBC super-lightweight champion Chantelle Cameron outclassed a game Mary McGee to add the IBF belt to her collection.
With the Ring Magazine belt also on the line at the 02 Arena, the British fighter extended her unbeaten record to 15 bouts with a well-crafted performance.
There is an argument that the judges scorecards of 100-90, 99-91 and 99-92 do not do justice to the grit shown by the defeated American.
Nevertheless, this was a career-best display from Cameron, who dominated during the early and middle stages before withstanding a more aggressive McGee during the latter rounds.
The 30-year-old now awaits the winner of the clash between Kali Reis and Jessica Camara, who fight for the WBA and WBO belts on November 19.
On an entertaining card in London, heavyweight Alen Babic dropped former world title challenger Eric Molina on multiple occasions on the way to a second-round stoppage.
British heavyweight Johnny Fisher beat Alvaro Terrero inside the same distance to advance to 4-0, while Craig Richards put himself back into contention for another shot at a world light-heavyweight crown with a sixth-round stoppage of Marek Matyja.
