Ashley Cole is looking forward to helping his former England team-mate Frank Lampard in his quest to guide Derby County to promotion.
The 38-year-old has played for Roma and LA Galaxy since leaving Chelsea in the summer of 2014.
He won 10 trophies during his eight-year spell at Stamford Bridge having previously starred for Arsenal.
Cole represented England 107 times between 2001 and 2014 and is keen to work with Lampard again.
"It's going to be a challenge," he said. "I've not played in England for five years now, so coming from the MLS in America and a different culture, different way of way of playing and philosophies then coming here where it's cold, it rains, difficult conditions and strong players in a good, tough league.
"I'm again coming out of my comfort zone when I could have stayed in the MLS and relaxed. I wanted to come here and fight for something, fight for a good cause and make promotion. I think that would be great for the club and for Frank Lampard and me as well.
"I had a conversation with Frank a month, maybe two months ago. It was a no-brainer to come here and get involved in this great environment and hopefully push for promotion."
Derby are 7/2 to be promoted this season and 6/4 to win their next Championship match against Preston at Deepdale on 1st February.