With a friendly against Wales and a World Cup qualifier with Latvia, Tuchel says he promised his players that selections would be made on performance.
As such, Arsenal attacker Saka would not have been recalled if not for Madueke being ruled out with injury after the Gunners winger's impact in the last international break.
Tuchel said: “For credibility, as a coach, you need to walk the talk. If this really meant something, the thing that I told the players after the game, and you, this is a very straightforward and logical decision.
“I didn’t want to leave anyone out who was in the last camp. What would be my explanation to leave them out and also be authentic in my words? After the Serbia match I went into the dressing room and I told them what I told you.
“Imagine I have a phone call this time and leave four players out, and say, “Now I take A,B,C and D, and not you” — what would you think as a player?
“Didn’t you tell me that was exactly how you wanted it, and now I’m out?” Would you not think that? I think, as a player you would.”