 If you liked
Ace wo Nerae!
|
 ...then you might like
Glass no Kamen
|
It contains similar plot based on main heroine who dreams to become the best and her rival who is perfect and famous (and Ryuuzaki reminds Ayumi). There is also male character who believes in main heroine and helps her (as Masumi do). Oka Hiromi has her ups and downs, but continue her path to be the number one tennis player.