Royal Challenger Bangalore star Virat Kohli has hailed his side's Nokia CL T20 semi-final win as the most exciting Twenty20 game he has ever played in.

Chasing a mammoth 215 to win, Arun Karthik smashed a six off the game's final delivery to leave the South Australian Redbacks brokenhearted and seal RCB a spot in the semi-finals where they join the Mumbai Indians, the New South Wales Blues and Somerset.

"I have never been in such an exciting Twenty20 match all my life," an ecstatic Kohli said.

"I had my eyes closed on the last ball. I was talking to our coach when two balls were left, and I thought if we could get boundary and a two then the scores would be tied."

Facing such an imposing target, Kohli said that the entire RCB team was grateful for the start handed to them by Chris Gayle and Tillekaratne Dilshan provided. The duo put in 65 for the first wicket.

"We thought if Chris and Dilshan could bat five or six overs, we had a fair chance."

About his own batting he said: "I was calm and relaxed, but of course you can't stay assured chasing a target such as 215."

Kohli's skipper Daniel Vettori was equally at loss for words after the match.

"It was a pretty amazing game of cricket. The one thing about this ground is that you can chase anything here. The last five overs that we bowled were really poor. Daniel Harris and Callum Ferguson and Dan Christian batted extremely well."

Vettori also said that dew did become a factor.

"The dew does change this wicket. The new ball turns a bit, but once it becomes soft, it's really difficult. However, the class of the batsmanship coupled with the wicket was amazing."

Stand-in captain for Redbacks skipper Callum Ferguson admitted that it was disappointing not to defend 214.

"Obviously, it's disappointing to not defend 214. Harris and Dan Christian batted well, Shaun Tait came back with the ball and went bang bang bang, but Virat and Dilshan batted beautifully. We were backing our bowlers to execute despite the dew, disappointed not to do that," Ferguson conceded.