User blog comment:Closednick101/On the matter of Shouting/@comment-6881629-20130629094749

From what i hear from npcs for one Torygg was very young so using a Shout was a bit overkill and also it was supost to be a duel, one on one fair combat so it was like challenging a kid to a fist fight then sumoning a Deadra when the match starts.

The closest thing you can do to a duel i think is the brawling mini-game and if you use a shout you automatically losse the fight and usually get a bounty.