Chelsea defender Andreas Christensen joined German club Borussia Mochengladbach on a two-year loan deal in 2015.
Christensen believes his experience at Borussia Monchengladbach has helped him improve as a player.
“I have come back to Chelsea a better player than the one that left two years ago,” Christensen told Evening Standard.
“I played about 80 games in two seasons and I have a lot more experience. I have a bit more toughness, more mental than physical.
“The physical side of things is something I still have to build on, but mentally it has given me a lot. I’m more confident, I feel ready for bigger things. I was up against a lot of top strikers, big teams. I remember when I played against Bayern for the first time, I was nervous beforehand because it is easy to look like a clown playing against these guys.
“Borussia played one against one at the back and I was directly up against Lewandowski first and then Muller later on, but we won the game 3-1. Everything went well and this is the kind of thing that gives me more self-belief at the top level.
“Borussia were in the Champions League as well so I got to have a bit of a taste of everything. I was up against Alvaro for one game and know what it’s like to play at Manchester City too. So I have had a bit of a taste of these big things and I want more of it in the future.”