It's emerged Werner resisted an approach from Manchester United ahead of returning to RBL.
He revealed: "I would be lying if I said I couldn't have thought about other clubs. After careful consideration, however, it quickly became clear that the step back to Leipzig would be a very good one.
"Next to the club, the coach is the most important part for the player. I had very good discussions with Domenico Tedesco. We are both Swabians, so you can communicate well. (laughs) Both sides were very fond of each other afterwards.
"Of course, I also had the 2022 World Cup in Qatar in mind. I would like to prepare myself optimally for that - and the best way to do that is over the course of the game. I didn't get that in my second year at Chelsea.
"So I wanted to switch to a familiar environment without a long adjustment period, where I would have the opportunity to play. Where I know what football is being played and the club also knows how I play.
"Another aspect was the city itself: everyone knows that I felt very comfortable here. London was a huge city and I will miss London a lot. But it's still nice to be able to visit the typical German bakery again and buy typical German groceries.
"The way home is now much shorter again. I think I've only been able to visit my family once in the past two years.
"And I'm also looking forward to our fans. I've always had a very good relationship with them. The people of Leipzig also supported me in the hard times. I'm really excited to be able to play in front of people again."