Woke up this morning as a genuine book winner! Last night my book Wrecking Ball won Rugby Book of the Year at the Sport Book Awards 2018 @sportbookawards #SBA18 Thanks @Wasserman & @GershonPortnoi ?? #WreckingBall pic.twitter.com/RSwVd53GdS
The No.8 will be assessed further next week to determine the extent of his injuries.
England will also be without the other Vunipola for the third Test next Saturday, though Billy’s older brother Mako has departed for family reasons, as agreed with the RFU prior to the squad travelling to South Africa.
Head coach Eddie Jones has called up Exeter prop Alec Hepburn to bolster his front-row options for the game in Cape Town on June 23, as England look to end a five-Test losing streak.
It was also confirmed on Saturday evening that Ellis Genge would return to England having sustained a knee injury last week.
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