Well, not directly. The Servants fought. Masters just... lived or died, based on the match. We gathered information and trained up our Servants before the fights, but most of us never took up arms ourselves. ....well, except Julius. He killed a lot of Masters himself, mostly in the Preliminaries, but then again he was the Harweys' assassin back on Earth to begin with. I have plenty of deaths on my conscience, by virtue of being the last person standing, but I don't really have many Code Casts I could use in a straight fight. Or... combat skills to speak of, really.