Tyson lands knockout blow against professionals at Rio

Former boxer Mike Tyson reacts as he speaks to the media, before the weigh-in of International Boxing Federation (IBF) World Championship Bout at the Mutianyu section of the Great Wall of China, on the outskirts of Beijing, China, May 24, 2016. REUTERS/Jason Lee

BEIJING (Reuters) - Mike Tyson has branded the Amateur International Boxing Association's (AIBA) decision to let professional fighters take part in the 2016 Rio Olympics as "ridiculous" and "foolish".

Professional boxers would feature at the Olympic games as long as a constitutional change went through in June, AIBA said earlier this year.