I've praised the ongoing mental breakdown that is Gothic Ginobili's player capsules before. Just today (timely!) he had his on Fesenko, with surprisingly encouraging words.

Kyrylo Fesenko doesn't get major minutes. In my view, he probably should. I understand the basic reason why hasn't happened. Fesenko is large and bulky, but he struggles absurdly much at the offensive end of the floor -- his per36 numbers are a tepid 10 points and 8 rebounds a night. Poor all-around, ergo, most teams barely deign to play him at all. But the game is played on two ends, and on one end of the court, Fesenko is rather special. His real value comes on defense -- Fesenko has reliably been among the tops in the league for almost every defensive stat he could for the last few years. On/off court adjusted plus/minus, Synergy stats, 82Games opponent tracking, everything -- name a defensive assessment stat, and Fesenko probably rates pretty highly on it. In the last few years, anyway. He isn't necessarily a great defender due to hustle plays, shot blocking, or freak athleticism. More aptly, he's a great defender because for someone his size, he's incredibly fluid. Moves as though he's six pounds shorter and 100 pounds lighter. Probably would make an EXCELLENT boxer. Combine that with his raw size, which is honestly incredible? You've essentially created this giant, highly mobile wall that smart teams employ very effectively to cordon off the rim and blow up any team's average pick and roll play. Even with his lacking offensive stuff, his defense makes him a clear NBA talent, and in a good situation where he's only called upon as a defensive rock he could carve out a relatively lucrative career. I'm hoping he does.

...

if they utilize him in a similar role as Asik, there's absolutely a fringe possibility he'll be just about as good. Which would be astonishing. But his limited-minutes defensive stats certainly indicate that kind of a potential in a greater role.