I found a tennis career only for Sims 3.
Someone adapt this career for Sims 2, please, since I don't know anything about Sims 3.
Download:
https://www.mediafire.com/?gkulg1rhrdu0o9tAlternative link:
https://modthesims.info/wiki.php?title=Tutorial:_Complete_Guide_to_Career_Modding_for_Beginners!