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 . The 22-year-old faces an RFU disciplinary panel on Tuesday afternoon and could face an immediate suspension following an accusation that he struck Leicester ’ s Mathew Tait . The full-back required attention after the 29th-minute collision at Allianz Park , where Vunipola was penalised for coming in at the side of a ruck but not for making contact with his head . Billy Vunipola ( left ) takes on Niall Morris during Saracens ' Aviva Premiership win over Leicester . Former England full back Mathew Tait was caught by Vunipola during the match at Allianz Park . With Saracens travelling to France as underdogs this weekend , director of rugby Mark McCall will be desperate for his in-form back-row to be cleared . Meanwhile , Toulon are plotting a move for Australia fly-half Quade Cooper after missing out on Sale ’ s Danny Cipriani , who signed a new deal in February . According to reports in France , the Cote d ’ Azur club have tabled an offer for the Wallaby No 10 who is expected to travel to France this week to discuss terms with owner Mourad Boudjellal , who made his fortune in the comic book industry . Boudjellal has already failed to land All Black fly-halves Dan Carter and Colin Slade and is still searching for a long-term successor to Jonny Wilkinson . Cooper is currently sidelined with a shoulder injury . Quade Cooper ( left ) in action for the Reds against the Rebels in Melbourne earlier this month . Danny Cipriani signed a new deal with the Sale Sharks back in February .
Billy Vunipola was citied on Monday night for an alleged butt . The Saracens No 8 will face an Niall Morris disciplinary panel on Tuesday . Toulon are plotting a move for Australia fly-half Quade Cooper .