Second-ranked Aryna Sabalenka had an upset 7-6 (6), 6-1 loss to No. 100-ranked Kaja Juvan on Wednesday in her first match of the season at the Adelaide International, one of the main tune-up tournaments for the Australian Open.

Sabalenka, a semifinalist at Wimbledon and the US Open last year, wasted a set point as she struggled with her serve in the tiebreaker. She then had 11 double-faults in the second set to give her 18 in total for the match. The win was Juvan’s first against a top 10 player and earned her a spot in the quarterfinals.

ALSO READ - Sania, Bopanna, Ramkumar get strong starts in WTA, ATP Adelaide events

“I was a little bit scared at first because she’s incredible and she has done so many things really, really well,” Juvan said. “But on the other hand, it’s the start of the season, it depends on the day a little bit, and I really believed that I could do it.”

Barty opens her 2022 season with win over Gauff in Adelaide

Top-ranked Ash Barty had a tough opener to her 2022 season, having to rally from a set and a break down to beat 17-year-old American Coco Gauff 4-6, 7-5, 6-1 on Wednesday in the second round of the Adelaide International.

The Wimbledon champion dropped serve twice in the first set and was 4-2 down in the second before recovering to win 11 of the last 13 games.

A two-time major winner, Barty is aiming to be the first Australian woman to win her home major since Chris O'Neil in 1978.

Barty reached the Australian Open semifinals in 2020 and the quarterfinals in 2019 and last year.

She had a bye in the first round at Adelaide, one of the main tune-up tournaments for the Australian Open which starts Jan. 17.

Rogers had to recover quickly after she led by a set and a break and then lost seven straight games to Sakkari.

Russia's Medvedev downs De Minaur, Auger-Aliassime saves Canada from the brink  

“It’s nice to start with a big win like that," Rogers said. "She’s coming off an incredible season last year and she’s such a great competitor. So I knew I had to bring my best tennis, whatever that looks like at the beginning of the year.”

Rogers will face seventh-seeded Elena Rybakina in the quarterfinals.

Crammed schedule

Travel restrictions during the COVID-19 pandemic mean there’s a crammed schedule of tournaments in Australia before the year’s first major starts January 17 at Melbourne Park.

The WTA 500 event in Adelaide is one of three women’s tournaments this week, including two in the so-called Summer Set in Melbourne.

The main men’s event this week is the 16-team ATP Cup in Sydney, with Daniil Medvedev aiming to help Russia defend its title. Rafael Nadal is playing in a tune-up tournament in Melbourne.

After months of uncertainty, No. 1-ranked Novak Djokovic confirmed overnight he had received a medical exemption from Australia’s strict COVID-19 vaccine requirements and he was heading to Melbourne in a bid to defend his Australian Open title.