Fiorentina could be without Valon Behrami for up to six weeks after he picked up a knee injury on international duty with Switzerland.
The ex-West Ham winger limped off the field just 15 minutes into a 0-0 draw in Bulgaria for the Euro 2012 qualifiers.
“Fiorentina confirm Behrami suffered a sprain to the knee during the Bulgaria-Switzerland match,” read a statement.
“When he returns to Italy on Monday, all necessary tests will be performed.”
Initial reports from the Swiss camp suggest it is a nasty sprain that could keep him out for six weeks.