The hard-nosed centre-back will miss Slovakia's friendly with Romania this week after sustaining ligament damage but has assured Reds fans that he will be back at training next week.
"The MRI scan confirmed that I have pulled ligaments in my left knee," he said.
"It is nothing serious but when I want to put full weight on the knee or I kick the ball, it hurts a lot.
"I believe that I will resume training in the next few days."
Skrtel, who is likely to miss the Reds' Premier League opener against Stoke City on Saturday, added: "We discussed the possibility of me at least going to watch the lads play.
"I was for this option, but Liverpool were against it. They didn't want me to give two days of possible treatment away like that."