Re: Which tennis country has underperformed the most considering their junior results
In the options given, it is France. Overall, it is not. Reaching top 10 can not be considered as underperforming.
India would be a better option. There probably would be others too.
Leander Paes: Won USO and Wimbledon juniors. Finalist at AO. Junior #1. Career high rank:73. Never reached round 4 of a GS.
Ramesh Krishanan : Won Wimbledon and FO juniors. Junior #1. Career high rank:23. Never reached a GS SF.
Ramanathan Krishnan : Won Wimbledon juniors. Been in top 8 seeds of a GS twice(Before ranking), never reached a GS Final.
Yuki Bhambri: Won AO 09 juniors. Junior #1 for a long time. Unheard of since. Junior GS winners after him have done much better than he has.