When thinking about what we will wear to our next tennis practice session or match, we are usually concerned with the comfort and style of our athletic apparel. After all, keeping comfortable during a workout is easily accomplished with all the moisture-wicking fabrics available to us today. And looking good while doing it … well, that’s a bonus! Both stylish and functional, tennis apparel has come a long way since the days of all-cotton, all-whites. So while we go to great lengths (and expense!) to purchase our outerwear and underwear, how many of us consider some “inner” wear? Inner-armour, as I like to call it, can also be stylish and functional. It can protect against injury, and for some players, actually enhance their performance on the court. This often overlooked piece of apparel is essential for virtually every sport. Of course, I’m talking about athletic mouth guards.