The Lazio striker, who is five goals short of Gerd Mueller's German record of 68 international goals, missed five weeks at the end of last season with a thigh injury.
However, the 33-year-old said: "I'm right on schedule and I am pain-free. I have a very good feeling we are well prepared and have a great team."
Germany face Portugal on Saturday, with Klose remaining cautious ahead of their opener, despite claims that Paulo Bento's side are reliant on Cristiano Ronaldo.
The forward said: "Portugal is not only Cristiano Ronaldo, they must also play as a team. If they want to beat us, they do it only as a team."




