And Coco Gauff's dream run came to an abrupt end when the consistency of seventh seed and former world number one Simona Halep proved a step too far for the 15-year-old American. Riske turned around a set deficit, and rallied all the way back on Court No.2 to knock out Barty, 3-6, 6-2, 6-3, and book her spot in her first Grand Slam quarterfinal.
Her second service game let her down badly, even during the opening set, with only 40% of points won. When asked about her success over the past year, the player replied with Buzz Lightyear's famous catchphrase: "I chat to my niece".
Not easy! Riske opened up her shoulders from all parts of the court and lived up to her namesake, putting the pressure on Barty by repeatedly finding the line.
"Also proud of the fact what we've been able to do over the last eight weeks", she added. Getting to the quarter-finals is wonderful, but just the way I've been fighting is the best thing for me.
Ash Barty will still remain World No.1 despite her shock exit at Wimbledon.
Williams, who lost to Angelique Kerber in last year's Wimbledon final, gets Riske next.
Without cracking so much as a smirk, she managed to let her one-liners go unnoticed to the press until this week. To have overcome the matches the way I have is what I'm most excited about. Again, I think today was a great preparation for me going into the Serena match. "She played a great match today".
She toppled the top seed 3-6, 6-2, 6-3.
Riske by name and risky by nature, the world No.55 bludgeoned 30 winners and committed only 15 unforced errors in recording her tour-best 14th grasscourt victory of the season.
American tennis player Alison Riske, now ranked 89, recently secured a deafening victory over Australian tennis star Ashleigh Barty at Wimbledon, securing a pass to the championship's quarter-finals. Riske has only shared the court with Williams once, as a doubles partner, knows her intensity will be off the charts and said she's ready "for a war".
"She lost the first set and stuck with the plan". Look, I mean, for me, nothing has really changed.
Riske's previous best grand slam result was a fourth-round defeat at the 2013 US Open. She deserves to be in the quarter final.
"I think it's super exciting", she said. Konta missed two match points at 5-2 in the decider but served it out on her next opportunity when Kvitova sent a shot long.