Things are certainly heating up down under, where Andy Roddick, Rafael Nadal, Russian Marat Safin and Andy Murray are practicing for the Australian Open. Down The Line thought you kids would enjoy some shots of the action.

He's got the face of a baby, the body of a man, and the temper of a teenager. As if that weren't enough to get us excited, throw in Russian tennis star Marat Safin's 6'5" frame and our mind starts to wander to his other measurements. We've provided a few clues after the jump.

CONTINUED »