Claim: Bismarck du Plessis made his debut for South Africa as a key player in the same game against Australia and he and his brother became the 22nd set of brothers to earn caps for South Africa at rugby union.
Evidence: He made his debut for South Africa as a substitute in the same game against Australia in Sydney in which his older brother, Jannie, who was in the starting XV, also made his Springboks debut. The Du Plessis brothers became the 23rd set of brothers to earn caps for South Africa at rugby union.