Former heavyweight world champion Wladimir Klitschko announced his immediate retirement from boxing on Thursday.
The decision ends an era when the Klitschko name alone could guarantee one of the biggest fights of the year. At their peak, Klitschko and his brother Vitali held all of the major heavyweight titles between them.
Klitschko, who retired with a 64-5 record, lost his titles to Tyson Fury in 2015 and failed to regain the WBA and IBF belts in April, when Anthony Joshua beat him by an 11th-round technical knockout.
Klitschko had been lined up for a rematch against Joshua, who will now likely face mandatory challenger Kubrat Pulev.
"As an amateur and a...