Blue ninja vs blue ninja. Classic!
Smart Sub-Zeros can give Kitana some trouble. But if Subz can't anti-air and play keep away, he is dead fast.
SUB-ZERO
Definitely need to turtle this match to win. Baiting and anti-airing are extremely vital to come out on top here. All jump-ins should be anti-air roundhoused by Subz. A good baiting play is throwing 2 freezes and then doing a floor ice. Sub-Zero doesn't have a lot of options in this match other than to stay away from Kitana's mad CQC and sweep, and counter whatever she does. The slide is a good play but it gets punished if you become predictable. Still, with aaRHs, floor ice, and slides, Sub-Zero can be very hard for Kitana to get near to. If Kitana is using IAF throws, throw lots of freezes, coz your freeze will hit her, but the fan will go over Subby's head.
KITANA
You want to be aggressive, though you have to gauge the level of the Subz you're playing. If your first jump-in is anti-aired, then you have to be sneakier. IAFs are very ineffective in this match because your fan goes over Sub's head, while you still get froze. Also, the threat of slides/floor ices makes it hard to bait and buffer IAF raises. Jump punches are harder to anti-air, use them when you jump-in. Best tactic is to just track Sub-Zero down relentlessly by foot. You can usually land a sweep, and then get in and mix up fan swipes, punches, elbows etc. Or he runs into a corner, and that's just Christmas come-early for Kitana! Square waves are great, just be sure to start them from within sweep distance, or Sub can duck and uppercut them on the way down.
Kitana isn't OP enough to destroy Sub-Zero, but she still wins if played well.
7-3 for Kitana, but she will need to work hard for each victory.