Paris - Clermont's France international scrumhalf Morgan
Parra could miss next month's European Cup final against Saracens with a thigh
injury, the French Top 14 club said on Tuesday.
Parra suffered the "muscle injury" during last weekend's 27-22 European semi-final win over Irish side Leinster.
The 28-year-old "will be monitored in the days and
weeks to come to determine the length of his absence", the club said.
Two-time European runners-up Clermont have already been hit
by the absence of Noa Nakaitaci and Wesley Fofana for the final against the
English side in Edinburgh on May 13.
Also sidelined for Saturday's Top 14 clash against Lyon are centres Aurelien Rougerie (foot), Remi Lamerat (knee) and prop Davit Zirakashvili (ankle), who all took knocks against the Irish.