EDITORS' CHOICE: The tennis equivalent of the Swiss Army knife, the Liquidmetal 4 is a versatile tool that can be used in almost any situation, be it offense or defense, at the baseline or the net. The medium-weight racquet offers a blend of power and control for intermediates and low-level advanced players with medium-length swings, though beginners will like it too because it’s easy to handle. The racquet’s key technology is Liquidmetal, a patented alloy twice as strong as titanium that doesn’t deform under pressure. The Defense Department is working on armor-piercing shells that will use Liquidmetal, and Cleveland Golf is incorporating the stuff into its clubs. What about a racquet? By placing the alloy at the head’s 10, 2, 5, and 7 o’clock positions, the Liquidmetal 4 returns maximum energy to the ball for increased stability, more power, and a bigger sweet spot. BOTTOM LINE: Superbly crafted frame for a wide range of players.