It was a rough afternoon for some former tennis stars and most lower seeds Thursday at the Professional Pickleball Association’s third Virginia Beach Open, but a few upsets spiced the day.

Action resumes at noon Friday and heads into the early evening at the sprawling Pickleball Virginia Beach facility, with the quarterfinals in all five pro events. The tournament offers more than $1 million in prize money, though some of the game’s top stars are overseas and/or taking a break. They include runaway women’s world No. 1 Leigh Anne Waters, 19, who earned a “triple crown” of singles, women’s doubles and mixed doubles titles in both of this tournament’s first two editions.

Men’s singles: 14th-seeded Yates Johnson, a New Mexico native, knocked off No. 3 Zane Ford 14-12, 12-10, while 19-year-old 16th seed George Rangelov ousted No. 4 Jack Sock 11-5, 11-6. Sock is a former world No. 1 in tennis doubles, and Donald Young — another American with considerable success in pro tennis — also lost.

Friday, No. 1 Roscoe Bellamy, who won last week’s tournament in Chicago, faces No. 6 Jaume Martinez Vich of Spain. No. 2 Noe Khlif of France will take on No. 8 Rafael Lenhard, who grew up in Brazil.

Women’s singles: No. 19 Sofia Sewing, a former Miami Hurricanes tennis player, knocked off No. 2 Brooke Buckner, last year’s runner-up to Waters, 12-14, 11-1, 11-1. Sewing moved into a quarterfinal versus No. 24 Estee Widdershoven, who downed No. 8 Genie Bouchard, the 2014 Wimbledon runner-up, 11-5, 13-11. Widdershoven grew up in Belgium and used to play tennis for Valdosta State in Georgia.

Also, No. 30 Maria Ford upended No. 10 Milan Rane 3-11, 11-7, 11-9.

Mixed doubles: In perhaps the day’s most exciting match, especially for those watching on the Tennis Channel app during the afternoon, the second-seeded team of Tina Pisnik, 45, and Khlif overcame No. 16 Anderson Scarpa and Alex Walker 9-11, 11-6, 12-10.

Pisnik, a former world No. 29 in tennis from Slovenia, made a sensational get to help win match point, which was upheld on a replay review that made sure the ball hadn’t bounced twice.

Women’s doubles: Sewing and Catherine Parenteau are the top seeds, but the most curious pairing might be the third seeds. Pisnik is teamed with 13-year-old Elsie Hendershot, a left-hander from Utah, forming a 32-year age difference between the partners.