3d网球：

Are you asking about 3D tennis video games or a type of tennis played in three dimensions? If it's the former, there are many great 3D tennis games available on various gaming platforms that offer a realistic and immersive experience. If it's the latter, I'm not sure if that's a thing, as tennis is typically played on a two-dimensional court. However, there are variations of tennis, such as beach tennis and paddle tennis, that are played on smaller courts and may involve more three-dimensional movement.

网球王子主题曲：

你在说的是日本动漫《网球王子》的主题曲吗？如果是的话，那么这部动漫的主题曲是非常经典的。

首先，这部动漫的第一季主题曲是《future》，由Hiro-X演唱。这首歌曲非常欢快，旋律动感，非常适合这部运动题材的动漫。

而第二季的主题曲则是《Driving Myself》，同样由Hiro-X演唱。这首歌曲的节奏更快，更加富有活力，非常符合动漫中角色们奋斗拼搏的精神。

总的来说，《网球王子》的主题曲非常适合这部动漫的氛围，能够很好地营造出角色们的热血与激情，让观众们更加投入其中。