England injury absentee John Terry has revealed he has been struggling with a hamstring problem since the World Cup.
The Chelsea captain will miss the upcoming Euro 2012 qualifiers against Bulgaria and Switzerland after aggravating the problem during Saturday's 2-0 Premier League victory over Stoke City.
"I have had a bit of a problem since the World Cup and I was hoping after the World Cup that I would have two weeks off and it would completely go away," Terry told the club's official website.
"But that wasn't the case and, coming back working hard, it came back on."
Terry played in the last England international against Hungary at Wembley on August 8 where he managed just 45 minutes of the 2-1 friendly victory.
He added:"I had to come off at half-time because of it.
"I have not made it public but I have been struggling with it and maybe I just need 10 days' rest to fully get over it because it could impact on my season."