She earned the Honda Sports Award for tennis and became the nation’s top-ranked player before turning professional in mid-2016. Collins quickly made an impact on the WTA Tour, with her breakthrough coming in 2018 when she reached the semifinals of the Miami Open as a qualifier, notably defeating former world No. 1 Venus Williams. This impressive performance propelled her into the top 100 for the first time in 2018.
Collins continued her ascent the following year, reaching the semifinals of the 2019 Australian Open, which marked her best Grand Slam singles result at the time, upsetting world No. 2 Angelique Kerber. Demonstrating consistent improvement, she secured her first two WTA Tour singles titles in 2021, triumphing at the Palermo Ladies Open and the Silicon Valley Classic. Collins later pursued a master’s degree in sports management from the University of Florida, showcasing her commitment to both athletic and academic pursuits.
The year 2022 saw Collins reach a career pinnacle, competing in her first major singles final at the Australian Open. Following this milestone, she climbed to a career-high ranking of world No. 7 and proudly became the American No. 1 female player.
In 2023, Collins added a WTA Tour doubles title to her resume, winning the Charleston Open. Despite an initial announcement that 2024 would be her final professional season, Collins delivered a resurgent and highly successful year. She claimed her inaugural WTA 1000 title at the Miami Open in March 2024, immediately following this historic victory with another singles title at the Charleston Open in April 2024. These back-to-back wins propelled her back into the top 10 ranking.
Her impressive 2024 season also included reaching the quarterfinals of the Paris Olympics. In October 2024, Collins reversed her retirement decision, confirming her intention to continue playing professionally in 2025.