Amanda Serrano seeks historic knockout of Lucrecia Manzur in final act of illustrious boxing career

Amanda Serrano has set her sights on securing one final piece of history before bringing the curtain down on her illustrious boxing career.

The reigning unified featherweight world champion faces Argentina's Lucrecia Manzur on August 21 in California, looking to secure her 50th professional victory.

Serrano can also set a new all-time women's boxing knockout record if she halts Manzur inside the distance for the 33rd stoppage of her career.

And Serrano says pulling clear of Christy Martin, with whom she currently shares the record of 32 KOs, would leave nothing more for her to achieve in the sport.