Dhoni and his team-mates were seen sweating it out at the Jharkhand State Cricket Association (JSCA) International Cricket Stadium.
Ranchi cricket fans will get to see their hero Dhoni in Twenty20 mode for the first time here.
CSK will play three matches in Ranchi starting with September 22 clash against South Africa's Titans.
Here are the pictures from CSK's practice in Ranchi and also Mumbai Indians and Brisbane Heat teams' preparations for CLT20.
Superstars of CSK
MS Dhoni, Ravindra Jadeja and Suresh Raina pose for photographers outside the JSCA stadium in Ranchi.
Captain and coach speak to the media
MS Dhoni and coach Stephen Fleming speak to the media ahead of Champions League 2013 in Ranchi.
Sachin and Harbhajan
Sachin Tendulkar and Harbhajan Singh of Mumbai Indians are seen during a practice session in Ahmedabad.
Pragyan Ojha will be the key
Left-arm spinner Pragyan Ojha will be one of the key bowlers for Mumbai Indians in CLT20.
Dinesh Karthik bats
Dinesh Karthik is seen batting during a practice session in Ahmedabad.
Brisbane Heat players sweat it out
Players of Brisbane Heat during a practice session for Champions League T20 at Jharkhand State Cricket Association (JSCA) Stadium in Ranchi.
Brisbane Heat players in Ranchi
Players of Brisbane Heat arrive in Ranchi for Champions League T20.