Novak Djokovic is now pitching UNIQLO's AIRism line, something he wears on and off court but we'll never see. It's performance underwear that's lightweight, soft, heat releasing, odor fighting and apparently quite comfortable. I haven't checked their women's line out myself.
"The fabric always stretches to fit my most strenuous moves. With this on, I can concentrate on my game...." says Djokovic.
There you have it. New and out from under cover.
Find it at UNIQLO.com and in UNIQLO stores worldwide.