If one wants insight into the talents of South Africa's coaches - Rassie Erasmus, Jacques Nienaber, and Felix Jones - then Jerry Flannery is a great reference point.
Flannery coached alongside the three men with Munster, and also played with Felix Jones for both Munster and Ireland.
Jacques Nienaber will be returning to Ireland after the World Cup, replacing Stuart Lancaster as a senior coach with Leinster, with their supporters desperately hoping that his prowess will be enough to see them win a fifth European star.
Given Flannery's experience as a player, and as a coach with Munster and Harlequins, his comments on RTE this afternoon, regarding Nienaber, will be music to the ears of Leinster fans.
They're [South Africa] incredibly competitive. Jacques Nienaber is probably the best coach I've ever come across. He's incredible, like a scientist.
Felix Jones is a phenomenal young coach as well. If you look at Felix's coaching CV, is he 35 now, 36, he's won a World Cup, won a Lions series.
He's going into this tournament now and has a really good chance of adding a second World Cup to it.
And over the top of that is Rassie Erasmus, who is probably the smartest man I've come across.
Jerry Flannery Waxes Lyrical About Jacques Nienaber, Felix Jones, and Rassie Erasmus
— RTÉ Rugby (@RTErugby) September 17, 2023