Still trying to explain why are we so good in Junior Circuit and so useless in winning WTA title.
First, I think that it DOES NOT necessarily require a huge talent to become a Top 100 player, of course it helps, but hard work can compensate for some lack of talent. HOWEVER while hard work is necessary it HAS to be complemented by an outstanding talent for an elite, Top 10 player. ( Feel free to argue with this point, as well as with others..
Second, while being quite nationalistic, I do NOT think that averagely Russians are more talented in tennis or generally in sports than other nations.
Third, mathematically the abilty to find great talents is mostly statistical - if your selection covered 1,000,000 of players, your Top one player selection is almost certain to be better than if your selection was only 1 out of 10,000 players, more than that, if you select 10 best out of 1000000 it is guaranteed to be a averagely much better than Top 10 out of 10000.
Next point, lets compare USA and Russia. USA selection covers
millions of Juniors, they don't always make great Juniors, but they more often make great Pros. Russia's selection is about 10000 and even this, I suppose, is an overestimation. Statistically we should have no chance at all.
Then why are we so successful in Juniors, and they are not, and they are successfull in Pros and we are not. My explanation is that
averagely Russian juniors work much harder than their US counterparts. I talked to some coaches ( not only in tennis ) who worked here and there and they all agree on that. They say that US youngster can fool around instead of practicing, of if (s)he wants to leave early, (s)he'll do that, and (s)he certainly will not work untill (s)he falls and certainly won't sacrifice her teenager's fun for hard training. In Russia, if a good coach is working with you, normally it is like an army, you don't discuss, you do what they say, you do it as long as they say, if needed they won't hesitate to yell at you, they know how to get the best out of you, and they will do that. And, I suppose, In Juniors it pays, hard work of Russian tennis youngsters beats the relative laziness of their more talented Western opponents.
But once a western player moves closer to PRO level, and start
working their hardest, their averagely greater talent beats the combination of preceding harder work and less talent of their Russian opponents.