We're sorry for this "On this day" but we've sadly struggled to find much of note for September 21st.
The most notable thing we found was the birth of Kyung-Duk Ahn back on this day in 1962. Ahn isn't a former world champion though did appear in a very high profile bout against Mexican great Julio Cesar Chavez Jr in 1990. That bout saw Ahn challenge the Mexican legend for the WBC and IBF Light Welterweight titles and although Ahn was stopped in the third round he still got the chance to perform on the biggest stage, something many fighters can't claim. The Chavez fight was Ahn's last as a professional and he retired after the bout with a 29-2 (12) record.
One of the few notable fight to fall on this day came in 1989 when Indonesia's Nico Thomas lost the IBF Minimumweight title to Eric Chavez. Thomas, the second Indonesian to hold a world title, was defending the title for the first time though unfortunately for him he was stopped in just 5 rounds by Chavez ending Thomas's reign after less than 100 days with the title.
It was on this day in 2001 that former Olympic champion Muhammad Abdullaev claimed his first professional title, the PABA Welterweight belt. Abdullaev, best known for his rivalry with Miguel Cotto, defeated Rey Pelonia in 2 rounds to win the previously vacant title. Sadly Abdullaev failed to become an elite professional and was stopped in 9 rounds by Cotto in his sole world title fight.
If you guys can think any extra suggestions here then let us know in the comment section!
(Image, of Abdullaev, courtesy of boxrec.com)