World champion and 6-0.
You don't hear that very often, but it's not very often someone comes along in the world of mixed martial arts like Ronda Rousey.
All six of her victories have come in the first round and by submission via armbar.
Whether you like her or not, there is no doubt she is a force in women's MMA.
Saturday night, she proved once again why she is regarded as one of the top female fighters in the world today.
You may have only seen her last two fights which were fought for Strikeforce gold, so here is a rundown of Rousey's professional fights since turning pro in early 2011.