 The Women's Rugby World Cup returned to a four-year cycle after 2017, with future competitions to be held in the middle year of the men's World Cup cycle.The most important competition in rugby union is the Rugby World Cup, a men's tournament that has taken place every four years since the inaugural event in 1987.South Africa are the reigning champions, having defeated England in the final of the 2019 Rugby World Cup in Yokohama.