Seb Davies could be facing up to two months out of action after suffering a posterior cruciate ligament tear in the defeat to Leinster at the Arms Park.
That may threaten the second row’s involvement in Cardiff Blues’ first two Heineken Cup pool fixtures in mid-October, as well as the Autumn Internationals with Wales, which would be an early blow in the last season before the Rugby World Cup.
The 22-year-old managed to finish the match against the league and European champions in round one, but did not fly out to Italy on Friday and was replaced by George Earle in the starting line-up against Benetton.
However, Davies could be back as early as the home game against Munster the week after next, with some PCL tears keeping players out for two weeks, while others are on the sidelines for seven or eight weeks.
John Mulvihill will hope it is the latter, after Seb put in a typically busy performance against Leinster, making 17 tackles and 34 metres, including one beautiful line break from a Kris Dacey pop pass.
In the meantime Mulvihill could opt to revert Josh Turnbull back to lock ahead of next week’s second game in Italy against Zebre, where he played much of his rugby in the second half of last season, as a fit-again Josh Navidi is available for selection in the starting XV.