Undefeated heavyweight contender Anthony Joshua has 15 knockouts wake 15 akatswiri ndewu. Check out this video compilation from SHOWTIME Sports showcasing all of Joshua’s KOs. And tune in izi Loweruka to watch the 2012 British Olympic Gold Medalist challenge undefeated American titlist Charles Martin for the IBF Heavyweight World Championship, moyo Showtime pa 5 p.m. AND/2 p.m. PT from The O2 in London.