Stefanie Graf

Tennis legend Stefanie Graf has been spotted wearing On U Jewelry on multiple occasions — including at the launch of the retractable roof at Wimbledon's All England Lawn Tennis Club in May 2009, where she appeared alongside Andre Agassi. Steffi is known to be a fan of Donna Silvestri's hand-crocheted necklaces, wearing several of her favorites from the On U Jewelry collection.

Steffi Graf and Andre Agassi on centre court during the launch of the new retractable roof at Wimbledon's All England Lawn Tennis Club in Wimbledon on May 17, 2009.

Steffi is wearing just a few of her many on u necklaces...