Andreas Christensen returned to Chelsea this summer after two years away on loan with Bundesliga side Borussia Mochengladbach.
The 21-year-old defender admits he is now a mature player than he was two years ago before leaving Chelsea on loan.
‘It is a difficult question to answer but actually just a little bit of everything,” Christensen told Chelsea’s official website.
“I got more game time so I have more confidence and I became more forward as a person. I am still the same person but more mature.”