Undefeated heavyweight contender Anthony Joshua has 15 priechodky v jeho 15 profesionálny boja. Check out this video compilation from SHOWTIME Sports showcasing all of Joshua’s KOs. And tune in túto sobotu to watch the 2012 British Olympic Gold Medalist challenge undefeated American titlist Charles Martin for the IBF Heavyweight World Championship, naživo na SHOWTIME na 5 p.m. A/2 p.m. PT from The O2 in London.