#Otto Wallin

Ukrainian heavyweight Vladyslav Sirenko is preparing to return to the professional ring in December 2026. His opponent is currently being determined.

Ukrainian heavyweight Vladyslav Sirenko sensationally knocked out tournament favorite Otto Vallin in New York! 🇺🇦🥊 The fight ended in the final seconds of the 10th round with a powerful blow that sent the Swede into a knockout. This victory has elevated Sirenko to a new level in the world rankings. 🚀