Billy Vunipola has suffered another World Cup setback after the England No8 underwent minor knee surgery last week.
The Saracens powerhouse is battling to beat a knee problem in time to feature in England's World Cup warm-up matches in August.
Billy Vunipola has suffered another World Cup setback after the England No8 underwent minor knee surgery last week.
The Saracens powerhouse is battling to beat a knee problem in time to feature in England's World Cup warm-up matches in August.