And, as he looked ahead to what could be one of the best days of his life, the Germany captain recalled one of the worst in 2002.
He said: "With (Bayer) Leverkusen, I was in the position that United are in now.
"It's different for Chelsea this season because we were always the team chasing. But I know what it's like to be on the other side of this situation.
"In the last game we needed just a draw and Bayern Munich needed to win.
"We lost and it was even against a lower team in the league - Unterhaching - so believe me, I know that anything is possible and it's possible it could happen next weekend."