article_snippet.sent: The Saracens are sweating over the availability of Billy Vunipola for Saturday’s Champions Cup semi-final against Clermont after the No 8 was cited on Monday night for an alleged butt.
article_snippet.sent: The full-back required attention after the 29th-minute collision at Allianz Park, where Billy Vunipola was penalised for coming in at the side of a ruck but not for making contact with he head.
article_snippet.sent: Billy Vunipola (left) takes on Niall Morris during Saracens' Aviva Premiership win over Leicester .
article_snippet.sent: Former England Mathew Tait was caught by Billy Vunipola during the match at Allianz Park .
article_snippet.sent: With The Saracens travelling to France as underdogs this weekend, director of rugby Mark McCall will be desperate for director of rugby Mark McCall in-form back-row to be cleared.
highlights_snippet.sent: Billy Vunipola was citied on Monday night for an alleged butt .
  