Britain's Fran Jones said it "means everything" as she defeated her childhood hero Venus Williams in the first round of the Miami Open.
Jones claimed a 7-5 7-5 victory over seven-time Grand Slam singles champion Williams, who - at 45-years-old - was the oldest player in the women's singles draw.
It is a first career WTA 1000 win for the 25-year-old, while it was Williams' ninth successive defeat since a first-round win at Washington last summer.
Meanwhile, second seed Iga Swiatek was stunned by world number 50 Magda Linette, who fought back from a set down to win 1-6 7-5 6-3 in the second round.