'ANTHONY JOSHUA IS MENTALLY WEAK!' - Prenga manager predicts KO

Keith Sullivan, manager of Kristian Prenga, talks about his charge's huge fight with Anthony Joshua on July 25. Subscribe to Seconds Out for the latest boxing news: http://goo.gl/meA2GB Follow on Twitter: http://goo.gl/VDYVMP Like on Facebook: https://www.facebook.com/secondsoutlive Follow on Instagram: https://www.instagram.com/secondsoutlive News website: https://www.secondsout.com/