Serena Williams may be in her third trimester, but apparently that isn't slowing her down in the slightest. Serena, now seven months pregnant, posted a video on Instagram earlier today that shows her kicking ass on the tennis court, baby bump and all.
By now, everyone knows that Williams won the Australian Open while she was (secretly) pregnant, and something tells me that she could still collect a few wins if she chose to indulge in a match or two while pregnant.
Watch the master at work in the video below.
[Photo: Getty Images]