Serena Williams is known for her fashion on and off the court, and since retiring from tennis two years ago, the legendary athlete has shifted her focus to more buttoned-up styles, including tailored suits and elegant gowns. But this year's U.S. Open gave her a reason to return to her roots.

The star was photographed over the weekend cheering from the bleachers in several sporty looks. One day she wore a preppy white collared tennis dress with a lime green Gucci logo. The next day, she recreated the iconic tennis outfit she wore on the court in her heyday.

Williams' boundary-pushing tennis match uniforms were already making headlines, but 20 years ago, at the 2004 U.S. Open, the then 22-year-old wore a Nike micro-mini denim tennis skirt and a black studded tank top on court The outfit was designed by herself. She designed the outfit herself. This past Saturday, she returned to that look and made headlines again. [...] [...] [...] [...] [...] [...] [...] [...] [...] [...]