Joshua's promoter says he has triggered Ruiz rematch clause

FILE PHOTO: Boxing - Anthony Joshua v Andy Ruiz Jr - WBA Super, IBF, WBO & IBO World Heavyweight Titles - Madison Square Garden, New York, United States - June 1, 2019 Andy Ruiz Jr in action with Anthony Joshua Action Images via Reuters/Andrew Couldridge

LONDON (Reuters) - Anthony Joshua will try to regain his lost heavyweight titles in a rematch with Mexican-American Andy Ruiz Jr. in November or December at a location to be decided, promoter Eddie Hearn said on Tuesday.

Ruiz produced one of boxing's biggest upsets by beating the 29-year-old Briton with a seventh-round stoppage at New York's Madison Square Garden on Saturday.