Harlequins scrum half Charlie Mulchrone will miss the rest of the growing summer season.
The 29-year-old was removed at the 31-29 win at Bath last weekend also will continue his recovery.
“We shall miss his on-field presence and direction,” mind of Rugby Paul Gustard said of the playmaker’s lack.
“Charlie gives our group so much more than simply his football skills. We’ll use his skills and personality in other abilities as we look to build on recent momentum”