Glasgow scrum-half Niko Matawalu will miss the start of the season after breaking a bone in his foot during training.
The Fijian has broken the fifth metatarsal in his right foot and has undergone surgery.
Glasgow, who kick off their RaboDirect PRO12 season against Cardiff in September, say he will be out for "several weeks".
Head coach Gregor Townsend said: "We're naturally disappointed that Niko will miss the start of the season.
"He brings so much to the squad both on and off the pitch and we wish him well in his recovery.
"Chris (Cusiter) is scheduled to return to full training within the next couple of weeks, and I've been really pleased with how Ali (Price) has adapted to our training since he joined us a few weeks ago.
"Along with Henry (Pyrgos), who is coming off the back of an excellent season with Glasgow and Scotland, there will be good competition for the number nine jersey this season."
Glasgow report good progress on the recoveries of Mike Cusack, Finlay Gillies, Dougie Hall, Ruaridh Jackson, Pat MacArthur and Duncan Weir, who are all expected to be fit for the "early part of the season".
Back Peter Horne has had an operation on his damaged cruciate ligament and is in the early stages of his rehabilitation.