Billy Vunipola warns of possible player strike in rugby

Vunipola has revealed his body "could not handle" the demands of playing for England and Saracens last season.

Billy Vunipola has called for the rugby season to be shortened considerably after revealing his body "could not handle" the demands of playing for England and Saracens last term.

The 24-year-old number eight missed the British and Irish Lions tour to New Zealand following surgery on his knee and shoulder, which he claims was necessary as he was "worn down".