LOS ANGELES (AFP) - Manny Pacquiao's anticipated showdown with Errol Spence is off after the unbeaten American suffered a torn retina in his left eye, organisers said on Tuesday (Aug 10).

World Boxing Association welterweight champion Yordenis Ugas will replace Spence and defend his title against the 42-year-old Filipino southpaw, an eight-division world champion, on Aug 21 in Las Vegas.