Inverness Caledonian Thistle midfielder Gil Blumenshtein is out for around a month after suffering a calf injury on his debut.
The Israeli tore a muscle during Saturday's SPL defeat by Celtic and was forced to limp off just 16 minutes after coming on as a substitute.
The 19-year-old is now expected to be missing from Inverness' plans until the end of September and manager Terry Butcher offered his sympathy to Blumenshtein.
Butcher told the club's official website: "The medical verdict is that Gil has a torn calf muscle and will be out of action for four to five weeks.
"It's a setback for us and a real disappointment for a lad who has been working hard and doing fine since joining us.
"It was hardly the ideal start to his Scottish career."
Butcher added: "Club captain Richie Foran is still another four weeks away from recovering from his knee injury sustained against Royal Antwerp.
"But we have to let that injury take its time as there's a long season ahead.
"Better news is that the medical report is that the rib injury picked up by Johnny Hayes against Celtic isn't too serious and he should be all right for Sunday's visit to Dundee United."