Tenz has no left-index finger for the match basically. It might also affect the mobility of his middle finger too, but I'm not knowledgeable about the thing, I just know it's swelling.
He has a joint infection, his index finger is swelled up. He can't really move his index finger but, since its swelling, it might also affect how well he moves his middle finger.
Yeah, I think Kyedae talked about it a bit on stream but she didn't really expand or show it. It'll at minimum afffect his movement too, which will be super rough.