Rhaast Counters Aatrox?

I've tried Kayn against a lv. 6 Aatrox around my high silver elo, and once I hit Rhaast he pretty well decimated Aatrox in the Top Lane. Did I just run into a guy having a rough game on Aatrox or is Rhaast a solid counter to him?
Best New

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

Report as:
Offensive Spam Harassment Incorrect Board