Moments when a 24-carat superstar bursts on the scene are few and far between, but always something to cherish. And we rugby fans have had two in the past few weeks. First came the dazzling performance by Sacha Feinberg-Mngomezulu, the Springbok No 10 who tore apart a powerful Argentina side in Durban in September, scoring a record 37 points with three tries, eight conversions and two penalties. With his effortless running and velvet touches all over the field, he suddenly gives the traditional raw power of the Boks an explosive new dimension. He is compellingly watchable, only 23, and will soon be as much of a benchmark of rugby excellence as the French scrum-half Antoine Dupont.

Closer to home was an extraordinary display by a north London teenager on his first start for Saracens in the

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