Stating that he did not want to be critical of his predecessor John Wright because he was very successful, the straight-talking former Australian captain said in an interview to a sports magazine,.
"It's not intended as any criticism but they (players) are going to have to work a lot harder in some areas. That is going to be the challenge. Some of the senior players may not want to work that hard," he said making it clear that a coach is "limited by how much effort the players are willing to put in".
Chappell, who is taking over as coach on June 15, does not anticipate any problem working with skipper Sourav Ganguly.
"I worked with him before when he came out to Australia and we spent four or five days together and I enjoyed his company. I found him to be very likeable and a very nice fellow. It will be good to renew acquaintances."
Chappell said India have four or five of the best players in world batting and to work with players of that quality would be a great honour and opportunity.
"In bowling you have Harbhajan and Kumble. There is a fair bit to work with but there is also a fair bit to do. It will be exciting, challenging, frustrating, all of those. It will be a ride -- the big dipper."