Reaching the top of the junior tennis world should indicate a player is on the path to tennis stardom — but there's a reason why that isn't the case.

In a match that lasted two hours and 35 minutes, the 19th-seeded Keys squeaked by 2nd-seeded Iga Swiatek from Poland, needing a third-set tiebreak to defeat her 5-7; 6-1; 7-6 (10-8) ...