Rugby analysts suggest that France's halfback and New Zealand's No 8 may challenge South Africa's World Cup strategy. The All Blacks' inspirational No 8 and France's talented halfback could force a change in tactics. Rassie Erasmus is seen as having a solid gameplan for the World Cup. However, the presence of these two players might lead to adjustments. The analysis highlights the potential impact of key players on the tournament's outcome. The competition is expected to be intense with several strong teams. The World Cup is set to be a highly contested event.