After being sent into bat, Chennai posted a challenging 158 for six with captain Mahendra Singh Dhoni top-scoring with 34 but the Lions chased down the target with three balls to spare in a thrilling Group B match that went down the wire at the Newlands.
Opener Gulam Bodi smashed a 46-ball 64 to play a big role in the Lions' win. The local side now are in a very good position to make it to the semifinals having beaten defending champions Mumbai Indians in their opening match on October 14.
Chennai, who had lost to Sydney Sixers in their opening match on October 14, squandered a sensational start in their defence of 158.
Image: Highveld Lions Chris Morris, left, reacts as his team wins the game against the Chennai Super Kings, during a Champions League Twenty20 in Cape Town, South Africa, Tuesday, Oct 16, 2012.