Bar Refaeli playing tennis in her underwear

I really couldn't tell you what this advert is for. They could be trying to sell tennis balls, tennis racquets, clothing, underwear or just about anything else for that matter. What matters though is that for whatever reason we have a video of supermodel Bar Refaeli playing tennis in her underwear and what ever it is they are selling I will buy it.

Supermodel Bar Refaeli looks like she has picked up some tennis tips from Rafael Nadal in this new ad for under.me ... which is apparently a clothing line. A comfortable one, it looks like. The Israeli beauty is featured playing tennis in her under.me underwear, and her groundstrokes, volleys and footwork look stronger than you'd expect. What, you're not looking at her mechanics? Our bad. What about her Nadal-esque wedgie adjustment? Somehow it's hotter when she does it ....