Undoubtedly one of the greatest athletes of all time, Serena Williams has been a trendsetter on and off-court. She began her career signing an unprecedented sneaker endorsement deal with Puma in 1998, before doing the same with Nike five years later. From catsuits to denim skirts to knee-high boots, she's made the most of her time with both brands and changed women's tennis fashion, from head-to-toe, forever.

Earlier this year, Williams captured her record-breaking 23rd Grand Slam title in the Open Era. While she's currently enjoying some time off following the birth of her first child, she plans to return to tennis soon, when she will begin her quest to catch Margaret Court for the overall record.

In honor of her 36th birthday, we’re celebrating her historic career with a look back at the sneakers she wore for her 23 Grand Slam titles.