Video: Serena Williams whacks mouth with racket, 'busted it wide open'

We say it all the time: The only person who can beat Serena Williams is Serena Williams. So far in Melbourne, she's taking that literally. On Tuesday, she

We say it all the time: The only person who can beat Serena Williams is Serena Williams. So far in Melbourne, she's taking that literally.

On Tuesday, she collapsed to the court after rolling her right ankle in her first-round match. She went on to win 6-0, 6-0. After a closed practice session to evaluate her ankle Wednesday, Williams was back on court Thursday in 100-degree weather for her second-round match against Spanish teen Garbine Muguruza. As if the ankle injury wasn't enough to worry about, Williams bashed herself in the mouth in the first set with her racket, after her follow through on a forehand went awry.

"I just busted it, busted it wide open," she said after the match, laughing.

"I think it happens to everyone, but I have never busted it wide open like that. So, yeah, I was like, Oh, no. I can't have a tooth fall out. That would be horrible.

"I don't know why my racket was even in my face. I mean, it's like I have been playing tennis far too long to hit myself.

"I'm like, come on. Like, Serena, pull yourself together here."

She did in fact pull herself together, winning 6-2, 6-0, firing a 128-mph ace on match point. She was pretty pleased about that one.

http://www.youtube.com/watch?v=NWzXZQEtyso

https://twitter.com/serenawilliams/statuses/291747688742023168

The good news is Williams' right ankle seems to be doing well. She did not require an MRI and says she was surprised by how good it felt Thursday.