Also worth noting that developing a top 100 tennis player is quite tough as tennis is a widely played professional sport compared to the more regional (and amateur) sports. See China as an example, where their academy model have struggled as well in the top professional sports (tennis, soccer, basketball etc.) where they have had much less success than in the other less professional sports.
Overall, it seems our private tennis academies are identifying at least some talent (especially on the girls side) at the junior level. We seem to be lacking the support to transition the best identified junior talent to success in the seniors (with Yuki being the best example) although TNTA has done it's bit in this area (with RamK being the best example of their efforts). Perhaps, AITA (and Mahesh) can also provide assistance in helping with that transition although they will need to be able to raise money for that effort and I suspect it does not make sense for the government to spend too much money on tennis as the medal rewards are much lower than spending in less competitive events. On the other hand, the top tennis players do get a fair bit of coverage in the media, so perhaps the benefits to the national image are there in developing a top tennis player. For e.g., Kei Nishikori (a top 10 tennis player) is one of the biggest sports stars in Japan with far more fame than their many gold medalists in the more niche sports.
BTW, where does TNTA get its money (is it from the Chennai Open)?