World Junior Chess Champions

Four + Aronian has high chances of becoming the 5th
In that case : GO ARONIAN !!!

But isn't the real question: How many World Junior champions have beaten a world champion using the 1...a6 opening??!?

But isn't the real question: How many World Junior champions have beaten a world champion using the 1...a6 opening??!?
Year 1980 :)
How many of them went on to become World Champion ??