After overcoming multiple wrist injuries, Juan Martin del Potro is healthy and back on the tour. He's so fit he had time in Delray Beach to join junior player Angelica and her coach "Randy" in getting some new tips for the upcoming season.

Upon his arrival, Coach Randy (who's quite obviously Vince Spadea in a jean jacket) was already in full crazy mode, instructing the two players to do a hip-hop and chicken dance as a warm up.

The players then moved on to forehands, where Coach Randy reprimanded the former No. 4. "Hit it like a slingshot, you swing too high," Spadea/Randy said about the 28-year-old's signature stroke.

Angelica tried to save the day by hitting her forehands the "proper" way, but Del Potro was having none of it, and upset the intense coach so much he stormed the court.

All credit to Outside the Ball for the very unique feature.