Joshua in Under Armour Extension

British heavyweight boxer Anthony Joshua has signed an extension to his endorsement deal with US brand Under Armour.

Joshua, who currently holds the International Boxing Federation (IBF) world title belt, agreed the deal at Under Armour’s Boston headquarters.

Joshua will fight Russian boxer Wladimir Klitschko on April 29, in front of an expected British record crowd at London’s Wembley Stadium. Three world championship titles are on the line during the bout, during which Joshua will attempt to defend his unbeaten career record.

Under Armour also lists NBA basketball star Steph Curry, US swimming legend Michael Phelps, world tennis No.1 Andy Murray and two-time golf major winner Jordan Spieth among its clients.