you said kucherov was not sick or dealing with anything the article I posted proved you were wrong here is the quote please read!Proof of what? That it was just one game for Kucherov? Read the article you posted... Or do you mean about Nylander? It was widely reported before game 1. He ate bad sushi and had food poisoning.
EDIT: I don't know why this article link is creating an embedded video, but it's titled "Maple Leafs' Nylander played through bad sushi in game 1" on Sportsnet.
"But this game wasn’t the same after Kucherov put his fingerprints all over it late in the second period. He had been dealing with flu-like symptoms since before Saturday’s Game 7"