Bethanie Mattek-Sands is an American professional tennis player. She has won nine Grand Slam titles (five in women's doubles and four in mixed doubles), an Olympic gold medal, and is a former world’s number one in doubles. Often referred to as “America's Tennis Rock Star” for her colorful apparel and hair, and signature knee-high socks, Mattek-Sands is also an advocate for various charitable causes and has used her platform to promote inclusivity and body positivity in sports.