Germany national team captain Philipp Lahm has some explaining to do after he blasted former Germany coaches Rudi Voeller and Jurgen Klinsmann in his new book "The Subtle Difference,” excerpts of which were published in German daily tabloid Bild.

The German football federation (DFB) said it would meet with Lahm to discuss the “sensitivity of dealing with internal team matters." Lahm said he did not intend to "offend Voeller, Klinsmann or anyone else" and apologized for the “misunderstandings.”

But it was pretty clear what Lahm thought about Klinsmann's short tenure as Bayern coach. “The players had to get together before games to discuss how we wanted to play at all,” Lahm wrote. “After six or eight weeks, all the players already knew it wouldn’t work with Klinsmann. The rest of the season was damage limitation.”

As for Voeller, Lahm had this to stay about how he ran things during the 2004 European Championship: “Training would be for perhaps an hour a day, and then everyone was allowed back to their rooms. I think that many were using Playstations at the time. There were no tactical discussions. There was no video analysis of the next opponent … The only thing we talked about were mistakes that the coach noticed.”

Voeller responded that Lahm "has no decency" for revealing the inner workings of the national team and that "what’s he’s said now about Klinsmann, for example, is an impertinence. I’m curious to see how the national team bosses handle it.” For now, Lahm remains national team captain.