Playing dirty! Villagers in Vietnam compete in mud ball wrestling festival to celebrate male strength and an ancient tale of victory over marsh demons. In football, a muddy, water-logged pitch could lead to a match being abandoned. But for this game with a difference, in a village in Vietnam, the more mud… the better.  These remarkable pictures show locals competing in a mud ball wrestling festival in Van village, in the northern province of Bac Giang, today.