Donald Young is one of the most hyped players I've ever seen on any tour; at least AK was good to look at.
How old is he ? 18 ? 19 this summer ?
If he hasn't made a mark now, I'm not projecting he ever will.
Oh right so i guess Fed, Nadal and all of the other top class Tennis players were "mentally amazing" when they were 18 too?!! , i remember seeing Fed fold under pressure to Tim Henman at Wimboldon when he was 21/22, sometimes players take longer to develope than others and that includes the mental side too, Young is just starting to find his feet on the tour and i have no doubts tight matches like today will only help his mental game.
By the time Chang was 19:
1988--San Francisco; 1989--Roland Garros, Wembley; 1990--Montreal / Toronto; 1991--Birmingham;
By the time Sampras was 19:
1990--Philadelphia, Manchester, US Open
By the time Agassi was 19:
1987--Itaparica; 1988--Memphis, Charleston, Forest Hills, Stuttgart Outdoor, Stratton Mountain, Livingston; 1989--Orlando;
Nadal:
2004--Sopot; 2005--Costa Do Sauipe, Acapulco, ATP Masters Series Monte Carlo, Barcelona, ATP Masters Series Rome, Roland Garros, Bastad, Stuttgart, ATP Masters Series Canada, Beijing, ATP Masters Series Madrid;
Roddick:
2001--Atlanta, Houston, Washington;
Federer:
Started his bloom at 20 ish; and well, the rest is history.
DY is nothing more than hype and hope.