Full schedule of ISL 2016; Full list of squads for ISL 2016
Kerala Blasters, co-owned by cricket legend Sachin Tendulkar, finished at the bottom of the eight-team table last season and placed their trust in the hands of the experienced English manager.
Coppell's side have only five points from the first five matches and the former Crystal Palace and the Reading manager explained just how big a challenge he has at hand.
"This is the biggest challenge for any manager because you are more or less given a squad of players and don't really have a great deal of say in the selection of the squad.
"You have a small say. We have players from France, Spain, Africa and obviously Indians. You have a combination of all the coaches (style) and you have to try and create a style of play which suits a majority of those players. Then you have to be successful," Coppell said ahead of his team's match against Zico's FC Goa here on Monday.
Coppell's comments could be construed as over the top but the former Manchester United winger surely knew what he was saying.
"In 15 weeks, I think this is one of the biggest challenges in world football. That sounds overtly dramatic but I think it is. Not just for me but for the whole organisation to try and get things right," he said.
Coppell is the third English manager for the Kerala Blasters. He was preceded by Leicester City boss Peter Taylor, who took charge of the club last season, and ex-England goalkeeper David James, who took the team to the final in the inaugural edition two years ago.
"My experience here has been great. That's based on the people. Wherever we have been, everyone has been friendly and tried to help as much as possible.
"The traveling can be difficult but again people have made it easy for us. The whole experience has been terrific so far," Coppell said.
Kerala Blasters play their home matches at the Jawaharlal Nehru Stadium in Kochi which draws attendances of 55,000 for each home game.
The passionate supporters whip up a frenzy, although Coppell believes the home atmosphere, given how multipurpose stadiums are built here, is not as intimidating as back home in England.
"There are not too many stadiums (here) which are like English stadiums where I am used to. They are close and intimidating. Quite a few here have running tracks around or the supporters are quite a long way away. So it's not as intimidating as in England," Coppell said.