Writing question.

[zainuu]

<p>According to SPARKNOTES
This sentence should have "she" instead of "her"
I don't understand why. It sounds so awkward, help needed.</p>

<p>I'm much stronger than (her),(which) is good (because) it means (I'll dominate) this wrestling match. ()= Underlined.</p>

[Chedva]

<p>Because "is" is understood:
"I'm much stronger than she is, which is good . . ."</p>