The 40-year-old tennis great, who has said she will "evolve away" from the sport after the US Open, won her opening match at the tournament on Monday, defeating Danka Kovinic 6-3, 6-3 at a packed Arthur Ashe Stadium.

Williams has dominated women's tennis for much of her career. She has won 23 grand slam singles titles, which is the most in the Open era and one behind the all-time record held by Margaret Court. She has also won four Olympic gold medals and over $94.5 million in prize money.

She and her older sister, Venus, transformed the sport when they became professionals as teenage phenoms. They've teamed up for many grand slam doubles titles and will play together at this year's Open. Their first match is later this week.

Source: CNN

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