UNITED NEWS INTERNATIONAL (UNI) — World boxing champion Lucas Matthysse has called it quits.

36-year-old Matthysse announced his retirement in an Instagram post on August 2.

In his native language, Matthysse thanked the people who supported him throughout a ten-year career.

His retirement comes after his loss to Filipino boxing legend Manny Pacquiao.

Pacquiao clinched the WBA regular welterweight title from Matthysse in a 7th-round technical knockout during a bout in Malaysia on July 15.

The Argentinian fighter first came to the world ring in 2010 in a controversial loss to Zab Judah. That fight was followed with several more allowing him to win other world titles.

He held the WBC interim super lightweight title from 2012 to 2013 and WBA intercontinental and WBO international welterweight titles until today.

Matthysse is leaving the world stage with an outstanding record of 39-5, 36 of which were knockouts.