Tuchel will come up against Guardiola for the first time as Chelsea boss
He said, "He's been a huge influence on me. When he was coach at Barcelona, and I didn't have a chance to know him personally, I was watching almost every game and was very impressed by the way they made success happen, the style, using Academy guys, ball possession.
"The most impressive thing about this team was how they defended when the lost the ball. I learned a lot watching them and understanding the game more, how adventurous and brave you can approach a game.
'"t was a big, big lesson. I was coach in the academy and then becoming coach in Mainz. Almost every match was a lesson in those days. Later I had the opportunity to play against him, which was not always a pleasure! I drew a couple of games with Dortmund, so we came close, now it's time we beat them, and the next chance is tomorrow."
On his plans for City at Wembley, Tuchel expects an open affair.
"English football, City's game and our game is about intensity with and without the ball. I expect a very offensive match, a very physical match.
"City have a clear style and DNA. They want to have possession and ball recoveries, and so do we. We have to be on point with our precision, passing and positioning if we want to hurt them. We need to be on it so we don't allow easy chances or space between our lines. We have to play with courage and play adventurously.
"It's the right moment for us to face a challenge like this.
"I hope we catch the moments where we can make them suffer. Then, from day one of next season, we will hunt them and try to close the gap between us. This is the benchmark for me."