Williams has autographed this Wilson Blade SW 104 Countervail tennis racket – the exact model she uses – in silver paint pen. Her signature is deemed authentic by virtue of Upper Deck Authenticated’s Five-Step Process. Includes certificate of authenticity and hologram! Serena's signature is guaranteed authentic through the Upper Deck Authenticated serial numbered hologram system. There may be some female tennis players who serve or hit harder than Serena Williams, but never in the history of the sport has someone combined that incredible power with precision touch, pinpoint accuracy and laser-like focus. She’s a master at her craft, paying attention to every detail in her preparation. She has long used Wilson tennis rackets to help transform herself into the world’s No. 1 player, a position she once held for 186 consecutive weeks. She captured her 23rd major championship at the 2017 Australian Open, a tournament she had won six times previous. She has won the AO and Wimbledon seven times each as the most Grand Slam tournament victories in her career.