Wasps scrum-half Joe Simpson faces up to two months on the sidelines as he recovers from a medial ligament strain.
Simpson suffered the injury in the loss to Leicester that ended Wasps' hopes of reaching the play-offs, and it could put a dent in his hopes of making England's World Cup squad, with an expected recovery time of six to eight weeks.
While Wasps have released a statement explaining that Simpson should be fit to go by the time England's World Cup preparation begins, the injury might see him miss out on Stuart Lancaster's 45-man squad.
"After Joe Simpson was forced to leave the pitch on Saturday against Leicester Tigers, the club has confirmed the Wasps’ scrum half sustained a grade two medial collateral ligament strain," read a statement from Wasps.
"No operation is required and medical staff are confident he will make a full recovery in time to participate in pre-season and in any World Cup preparations should he be selected. Simpson will undergo a period of rest and rehabilitation for approximately six to eight weeks."