Their most recent head-to-head took place on April 29 in Abu Dhabi, which was among three UAE cities which played host to the IPL's first leg.
That clash turned out to be a battle of epic proportions. Both the teams ended their regulation overs on the same score, before also finishing level in the Super Over.
Finally it took a boundary count back to decide the match which was won by Royals in final analysis. And it would be interesting to see whether KKR would be able to pull themselves up from the slumber and extract revenge for the heartbreaking loss.
KKR, on the other hand, were thoroughly outplayed in their 34-run defeat at the hands of Chennai Super Kings in their most recent match.
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The biggest strength of Royals going into tomorrow's match is their in-form batting. The team is on a three-match winning streak and given the dismal form which Kolkata is battling, a fourth victory on the trot does not look unlikely.
Royals' batsmen have been in fine form but more would be expected of the likes of Shane Watson and Sanju Samson, both of whom have been making decent contributions but yet to come up with something really big that they are famed for.