There are levels of tournaments. 7 being the lowest 1 being the highest. more points for high level tournaments..L7 are generally 1 set round robin tournaments. L6 are two out of three sets with third set being 10 pt tiebreak (at least at 12/14s unsure of 16s)...L5 are two out of three full sets and I think reward points for any win, even if its just consolation back draw win. You have to be a certain rank (maybe top 30) to qualify for L5s and above..I think L4s are considered national level tournaments (or sectional)..L3s and above are DEF national level. There are also official selection list tournaments where top 2 or 5 from each US region are eligible to play then everyone else is on a waiting list if they want to play and the top 2/5 dont want to play. I have also recently seen some L4 or L5 tourneys sponsored by Bolletieri that could grant auto admission to his camp.
The ranking system is flawed in itself though. Its singles points plus 25% of doubles points. Points accumulated in an older age bracket count towards younger age bracket. Thing is this...I think the highest of the 8 previous point totals from a tournament count towards your ranking..Let me give you an example.
Player A wins 8 L6 tournaments at 12 years old. Gets 300 points for each tourney win. Unless they play a higher level tourney their point total is capped..even if they win 5 more L6 tournaments in a row. It may be the last 8 point total results in general but I think my previous statement was right. My player won a 14s L7 round robin at 11 years old but only received 135 points for it so it didnt count for anything (even though there were quality opponents).
Player B wins 5 L6 tournaments at 12 years old. 300 points for each win. Loses first round each other singles tourney (maybe played weak opps in wins and lost to stronger players). However, those points got his/her total high enough to qualify for upper level tourneys (5,4,3 etc). Player B plays 5 upper level tournaments...could win only one match in each and earn more than 300..and if its a L4 or L3 doubles tournament..could get up to like 1000+ points without winning it all..same points apply for doubles..so that player could get like 400/500 points by winning one or two doubles matches (still with a losing record) because 25% of doubles total counts to singles and can thus be ranked higher than Player A.
Bright side is that any legitimate recruiting site or camp or possible endorser also looks at win-loss...but it generally can fukk up seeding. My player wasnt seeded..the #1 seed was a girl she was 3-0 against and has a terrible W-L but plays a ton of doubles. Hence, my player had to beat the 1 and 2 to win while the 1 coasted. Furthermore, TDM (tournament data manager program used by tourney directors) only seeds a certain amount of players depending on draw and if you are not seeded then its completely random. So, hypothetically, a girl who is terrible and is playing their first tourney could have an easier draw than a top 20 player if the overall draw is small enough and there are 2 or 3 top 20 players.
One girl is ranked 12th. Her record is 54-46. She played one L3 doubles tournament, lost second round and won consolation via withdrawal. She got 750 points to her ranking for that.
My player is 2-0 against that girl. Shes 32-11 since Ive been coaching her in singles, 0-3 in doubles and 33-16 overall. Shes ranked 24th.
When I was a junior it was basically just challenger/champion level tourneys. Now its so fukkin convoluted and ridiculous that its backwards..no sliding scale for strength of schedule either.
I think that covers it.
http://tennislink.usta.com/Tournaments/Rankings/RankingHome.aspx you can check all the different lists and bullshyt here
of course..my junior rankings from when i was #1 in the region and was being offered credit cards by bolletieri is no longer in the archives