It should be Suresh Raina 's 87 of 25 balls against Kings 11 Punjab in Qualifier 2 of 2014 season
Kings 11 Punjab and Chennai Super Kings were battling for second spot in the final. Chennai Super Kings won the toss and elected to field first which turned out to be a bad decision. Virendra Sehwag scored 122 of just 58 balls to help Punjab to score a big score of 226.
In reply, CSK lost Faf du Plessis on the second ball of the innings itself. Raina came to bat and smashed 87 runs of just 25 balls which included 12 fours and 6 sixes. He smashed 18 runs of Sandeep Sharma’s 2nd over, 20 of Mitchell Johnson’s 4th over and 33 of Parvinder Awana’s 6th over. His team's score was 100/2 in 6 overs which was the highest powerplay score during that time. He later unfortunately got runout in the next over and his team lost the way and went on to lose the match.
His innings is regarded as the one of the greatest innings in IPL history.