Harbhajan had opted out of the 2020 edition of IPL due to personal reasons.
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Taking to Twitter, Harbhajan thanked CSK fans, team management and support staff for beautiful memories.
"As my contract comes to an end with @ChennaiIPL, playing for this team was a great experience..beautiful memories made &some great friends which I will remember fondly for years to come..Thank you @ChennaiIPL, management, staff and fans for a wonderful 2years.. All the best," Harbhajan tweeted.
Harbhajan Singh was roped in by CSK for INR 2 crore at the IPL 2018 auction after his association with Mumbai Indians for 10 years. He represented the Chennai-based franchise in 24 games and claimed 23 wickets from it.
Harbhajan had opted out of the 2020 edition of IPL, which was held in UAE, due to personal reasons.