Amos, 19, has enjoyed a productive season with Newport Gwent Dragons and earned a Wales debut in November's autumn international clash with Tonga.
And as the Dragons prepare to face Cardiff Blues on Boxing Day, the teenager is relishing the tough tack of keeping his opposite number quiet.
"It will be a good challenge," Amos said. "I like to pit myself against the best and he is a Lions Test winger and one of the best in the world - it will be nice to see how I go against him.
"Hopefully I can stop him getting on the score sheet. He does pop up with quite a few tries.
"Alex is obviously an amazing player but with someone like him, you know a bit more what he is going to do - you know what is coming really.
"I don't have a preference when it comes to big or small opponents. I think it's nice to get your head around both and learn from both when you play against them. Alex is big, but he's also very quick over the first 40 metres."