"I feel ready," the 24-year-old told arsenal.com.
"I like the physical challenge of the English league. I will gain a little muscle, but I am not afraid of anything; I just want to get stronger."
Koscielny and Thomas Vermaelen have linked up well in pre-season but the Frenchman knows that communication will be key to their on-field relationship. That's why he's brushing up on his language skills in time for the new season.
"Thomas and I help each other a lot on the pitch," he said.
"The job demands a lot of communication, being in defence. I am trying to make as much effort as possible to speak in English so that the communication is fluent on the pitch, and slowly it will come. It will get better and better."