Anthony Joshua of lacking “mental toughness” ahead of their heavyweight showdown next month. Joshua is set to defend his unified heavyweight titles against IBF mandatory challenger Pulev on December 12, which is the third time he has been scheduled to face the Bulgarian.AJ was originally due to lock horns with Pulev back in October 2017, only for the latter to pull out of their clash at the Principality Stadium in Cardiff with a shoulder injury.And after working his way back into a mandatory position, the 39-year-old saw his proposed June 20 meeting with Joshua fall through because of the coronavirus pandemic.Now the pair are set to finally battle it out after rearranging their scrap for December 12 at London’s O2 Arena.
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