"People will talk about the winner, which is a great goal, but when we are 1-0 down in a home nation derby and we have lost the last few games, to step up and take the penalty - it was a great execution, nice and composed," Coleman is quoted as saying by the BBC.
"He keeps on producing swashbuckling performances and doing things that not many other players are capable of doing.
"He's a special player, we all know that, and if you think, he is 23 - he has not even peaked yet. He is an amazing player."
Wales are now fourth in Group A with three points from three matches.