User blog comment:Deshiba/RIOT Reworks./@comment-24613667-20140324163445/@comment-24613667-20140326183545

He's not the most powerful melee carry, but he's one that will build tank, dive in, and just stick to you until one of you is dead. And, if he's got Blade of the Ruined King and/or a Trinity Force, you're gonna have a really tough time coming out on top. As we've both said, CC'ing him is the key, but you're pretty much screwed if your team doesn't chain CC him until he's dead, which leaves the rest of his team free to do whatever they please.

Riven obviously does more damage and actually has some escape, but she usually doesn't build very tanky and so you can probably burst her down if your team lands even one stun. Tryndamere is in a similar boat, but it can only stay afloat for 5 seconds; he's in your face, you're either dead or you're not, and then he's much less of a threat as he runs away with 200 hp.