I'm not sure if this was in the game before, but a deer-demon and a goblin had a duel to see who would become the law-giver of The Great Evil. The deer-demon won, but the goblin managed to escape unscathed.
FAKEDIT: In the late summer of 8, the Duel of the elf Tise Combinedbeaches and the dwarf Aban Flasheddrag occured during the battle of "The Clash of Soldiers". Tise Combinedbeaches was repelled while Aban Flasheddrag stood fast (The dwarfs still lost the battle though).
REALEDIT: Thoughts about races after browsing legends:
Dwarfs are badass killing machines in this new version. After a hundred years they can field armies of at least 600, and they rarely take any loses against goblins and humans.
Elves basically have one shot at winning any war. If they can win the first battle/siege, then peace is made soon after that. If they lose the first battle, well, then they'll just have to suffer a bunch of armies marching through their lands pillaging everything.
No clue about the goblin's prowess, since they field at best 12 goblins and three trolls at a time.
Humans suck, period. 600+ humans vs. 3 goblins and 2 trolls. The humans kill 4 of the defenders. The goblins kill 448 humans in return, winning the battle. The only time that I've seen the humans win a war was when they were fighting other humans or when they were attacking civilizations that the dwarfs had already weakened.