The Saracens prop was sent off for using his shoulder in a ruck in their win over Newcastle Falcons - the first red card of his career - and was charged with dangerous play. His case was heard on Tuesday by an independent disciplinary panel.

The RFU said his three-week ban may be reduced to two weeks if he completed the World Rugby Coaching Intervention Programme (CIP).

Saracens' win ensured their perfect record remained intact but the Premiership table toppers will not have Vunipola for their match against Bath (October 15th) and the Premiership Cup game against London Irish (October 17th).

Vunipola will be available for the Premiership game against second-placed Exeter Chiefs on October 22nd if he completes the CIP.

England begin their autumn internationals campaign on November 6th against Argentina at Twickenham Stadium.