Boxing-Undisputed champion Charlo breaks hand; title bout against Tszyu postponed

FILE PHOTO: Dec 7, 2019; Brooklyn, NY, USA; Jermall Charlo (blue and red trunks) reacts after knocking out Dennis Hogan of Ireland (white trunk) in the seventh round during a middleweight world championship fight at Barclays Center. Mandatory Credit: Sarah Stier-USA TODAY Sports

(Reuters) - Jermell Charlo's bout with Tim Tszyu has been postponed after the undisputed super welterweight world champion broke his hand in training, promoters said on Saturday.

American Charlo, who holds the WBO, WBC, IBF and WBA belts, became the undisputed champion when he knocked out Brian Castano in May.