I sparred with a player using Rakza Z. He's quite a few levels above me and can devastate me even when playing with a frozen banana and using his off-hand. I'm quite used to getting spin/speed pressure from him above my ability to cope.
He played strongly and confidently, with a very low error rate. Perhaps safer than usual. However, there were three things I found remarkable.
One, FH flicks. Usually, when I serve short backspin to his FH that's an immediate flick kill. Now, there was a high error rate.
Two, counterspinning. I'm used to high speed and insane spin incoming. What i got was high speed, but I had to compensate and open up my angle to clear the net.
Three, slow brush openups on backspin. He does these every now and then, because they're safe and so spinny that they're hard enough to deal with, even at his level. Now, however, I could easily kill them.
I would have expected differently.