Racing 92 have suspended Martin Castrogiovanni after the prop was pictured partying with Paris Saint-Germain players in Las Vegas while his team-mates were securing their place in the European Champions Cup final.
The Italy international reportedly told Racing that he was unable to travel to Nottingham for the last-four encounter with his former club Leicester Tigers on Sunday due to a family issue that required him to travel to Argentina.
Castrogiovanni was instead photographed alongside the likes of PSG striker Zlatan Ibrahimovic and Angel di Maria in Nevada.
And Top 14 side Racing have announced the burly forward will not be considered for selection while they investigate the matter.
A club statement said: "After the media published some pictures of Martin Castrogiovanni celebrating with Paris Saint Germain footballers this weekend in Las Vegas, while all our squad was in Nottingham to play the European Cup semi-final, Racing 92 decided to suspend this player as an interim measure and will start a legal procedure."