Take home this Wilson tennis ball, an offical US Open product.

American champion Venus Williams has signed the ball, making it unique.

A former world No. 1 in both singles and doubles, Williams is generally regarded as one of the all-time greats of women's tennis and, along with younger sister Serena Williams, is credited with ushering in a new era of power and athleticism on the women's professional tennis tour.

Williams has been ranked world No. 1 by the Women's Tennis Association for a total of 19 weeks (11 in singles and 8 in doubles). Williams' seven Grand Slam singles titles are tied for 12th on the all-time list, and 8th on the Open Era list, more than any other active female player except her sister. She has reached 16 Grand Slam finals, most recently at Wimbledon in 2017. From the 2000 Wimbledon Championships to the 2001 US Open, Williams won four of the six Grand Slam singles tournaments in that span. 

Williams has won four Olympic gold medals, one in singles and three in women's doubles with her sister, along with a silver medal in mixed doubles.