Games played in the last round of a round-robin tournament inspire match-fixing or tacit collusion if the two opposing teams can benefit from a particular result at the expense of other teams. In the case of four teams, the current study identifies all these situations caused by using head-to-head records as the primary tie-breaking principle. Simulations based on the 2016 UEFA European Football Championship reveal that the official tie-breaking policy substantially increases the risk of collusion, but it can be mitigated by choosing an optimal order of matches. Following the proposed schedule improves the competitiveness of the two games played in the last round and requires no reform on the format of the competition.

翻译：在最后一回合的圆柱锦标赛中,如果两个对立队能够从某个特定结果中获益而牺牲其他队的利益,那么游戏会激发对等或暗中串通,在四个队中,本项研究确定了使用头对头记录作为主要断线原则造成的所有这些情况。基于2016年欧洲足球联合会欧洲足球锦标赛的模拟显示,官方的断线政策大大增加了串通风险,但可以通过选择最佳的比赛顺序来减轻这种风险。在拟议时间表之后,两场比赛在最后一轮中的竞争力得到了提高,不需要对竞争形式进行改革。