Clearly, she wasn't star-struck when facing her idol.

Collins got the biggest win of her pro career Wednesday night, shocking the eighth-seeded Williams 6-2, 6-3 in the Miami Open quarterfinals. Collins needed to survive two qualifying matches before making the main draw at Key Biscayne, and will now meet sixth-seeded Jelena Ostapenko in Thursday's semifinals.

"The first time I saw Venus in the locker room, I nearly cried," Collins said. "I mean, I've idolized her my whole life. She's been my favorite player for forever. This is such a special moment, I'm just trying to wrap my head around it."

Collins topped US Open finalist Madison Keys earlier this month at Indian Wells and made a much bigger statement with this win. She threw both fists into the air when Williams couldn't handle a serve on Collins' second match point, and even the three-time champion at Key Biscayne gave her a big smile when they shook hands at the net.

"I'm just starting to finally put all of the pieces together," said Collins, the 2014 and 2016 NCAA champion at Virginia.

Collins, No. 93 in the world for a few more days, will more than double her career earnings when the money from Miami arrives. She came to Key Biscayne with $305,385 in career earnings, which she'll add at least $327,965 to now that she's in the semifinals. And she's going to soar in the world rankings, to no lower than 67th.

No qualifier has ever gone this deep at Key Biscayne, though Collins looked perfectly comfortable on the stage. She rarely faced trouble, offered confident fist pumps for much of the night and set the tone by breaking Williams -- one of her idols, someone who's been playing pro matches for about as long as the 24-year-old Collins has been alive -- with her opening chance in each set.

And now Collins, who took the more-unusual path through college to pro life, still has a shot at becoming perhaps Miami's most surprising champion.

"You don't have to do it the traditional way," Williams said.

Ostapenko got her spot in the semifinals by ousting fourth-seeded Elina Svitolina 7-6 (3), 7-6 (5) and now will get the upstart Collins with a berth in Saturday's final at stake. The other women's semifinal is Thursday afternoon, with No. 13 Sloane Stephens set to meet three-time Miami champion Victoria Azarenka.