Chelsea midfielder Yossi Benayoun has been ruled out for six months with an Achilles injury.
The problem was revealed after Benayoun reported for international duty with Israel last week.
Scans revealed a tear to his Achilles tendon and Benayoun was forced to miss Israel's Euro 2012 qualifiers against Croatia and Greece.
The former Liverpool and West Ham schemer will now undergo surgery on the injury next Monday which will rule him out for six months.
"Yossi Benayoun will undergo surgery on his Achilles on Monday," a statement on the club's website said.
"The Israeli international returned to the club from international duty last week, and will now be out of action for approximately six months."
It means Benayoun is set to miss the remainder of the season and could force Chelsea into the transfer marker for a replacement when the window reopens in January.
The news is a major blow for Benayoun as he has struggled to establish himself in Carlo Ancelotti's plans since his arrival from Liverpool in the summer.
Better news on the injury front for Ancelotti is that Alex and Salomon Kalou are both set to return to training next week after thigh problems.