Wimbledon 2015 Week Two: Inside the Secret Bunker

ABC News’ Bob Woodruff takes us into the commentator's booth at Wimbledon.

Watch the video above for all the details

Now, Serena just needs a few more wins to clinch the championship. That would also mean she would achieve what she calls a "Serena Slam" -- winning all four Grand Slam tournaments in a row, a feat she previously achieved in 2002-2003.

The last person to win a true Grand Slam -- all four majors in one season -- was Steffi Graf in 1988.