British boxing champion Anthony Joshua has been slammed for saying that he “doesn’t know what sportswashing is” when questioned on Saudi Arabia’s human rights record ahead of a boxing match taking place in the kingdom. Joshua, who is due to face Ukrainian boxer Oleksandr Usyk in a highly anticipated re-rematch in Jeddah later this summer, insisted that he will be in Saudi Arabia “to have a good time”. Joshua, often considered one of the world’s best heavyweight boxers, will be looking to win back several belts which he lost to the Ukrainian when he faces him again in the Saudi coastal city’s S…