Panathinaikos striker Marcus Berg will undergo scans and he is likely to stay on the sidelines for several weeks due to hamstring injury.
Berg picked an injury during yesterday's Europa League game against Standard Liege and he was rated very doubtful to face Olympiakos on Sunday.
The Swedish striker will undergo scans on Friday but his hamstring injury will probably keep him out of action for several weeks.
Therefore, Berg will miss the derby against Olympiakos and the games with the Swedish National Team which follow in November.
Berg also remains a doubt for the derby against AEK Athens on the 20th of November.