Well, like all new actresses, Serena will be better at some roles than others. Some people are good at emotional scenes and others aren't. This is what I think of her acting that I have seen so far,
Law & Order SVU - The role was too short, I think she had maybe three lines in one scene.
My Wife & Kids - She did good, she was actually quite funny.
The Division - She was terrible in this role, it just didn't suit her.
Street Time - She was very good in the role, and believable.
Evonne Goolagong, winner of 7 Grand Slam Singles Titles