You already know "The Twelve Days of Christmas"—so we're doing something a little different this year. Throughout December, we'll highlight 12 things about the 2014 PowerShares Series, a competitive tennis circuit featuring legendary icons and world-renowned champions beginning on February 5.

For our penultimate Q&A, we spoke to U.S. Open and Wimbledon finalist Mark Philippoussis.

TENNIS.com: How do you train to prepare for the PowerShares Series?

MARK PHILIPPOUSSIS: I'm up early everyday training in the gym and get out for a surf too. I will definitely need to start adding some tennis soon, haha.

TENNIS.com: Among PowerShares Series players, who was your toughest opponent during your career and why?

MARK PHILIPPOUSSIS: Andre Agassi, because he was the best returner of all time and I knew I had to be serving my absolute best to have a chance. It was so tough to get free points off my serve like I normally do.

TENNIS.com: Who are you most looking forward to facing this season?

MARK PHILIPPOUSSIS: Honestly it's any one of the guys. They are all great guys so I'm looking forward to being out on the court with them again.

TENNIS.com: Most bizarre moment you ever experienced on court?

MARK PHILIPPOUSSIS: Forgot my underwear once, very uncomfortable!

TENNIS.com: Your best serving tip for recreational players?

MARK PHILIPPOUSSIS: The ball toss is the most important thing! It all starts there.

TENNIS.com: If you could have played any other sport professionally, what would you choose?

MARK PHILIPPOUSSIS: Surfing.

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12 Days of PowerShares Series: Mark Philippoussis Q&A

12 Days of PowerShares Series: Mark Philippoussis Q&A

For more on the PowerShares Series, including ticket information, go to powersharesseries.com.