Serena reaches 4th round without dropping a set

United States’ Serena Williams hits a backhand return to compatriot Nicole Gibbs during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Jan. 21, 2017. AP

MELBOURNE, Australia — Serena Williams made the net seem much higher and the court much smaller for Nicole Gibbs, a first-timer on Rod Laver Arena.

Williams has been playing on the Australian Open center court since 1998, and has won six of her 22 Grand Slam titles there, so it’s a little wonder she’s precise.

Williams beat Gibbs 6-1, 6-3 in the third round on Saturday, and hasn’t dropped a set as she progressed to the fourth round and continued her bid for an Open-era record 23rd major title.

The 35-year-old Williams didn’t face a break point until she was serving for the match.

Dropping serve in that game was her only lapse in a match that then extended just beyond the hour — to 63 minutes to be precise. That made it one minute and one game longer than her only previous match against Gibbs.

“I don’t have anything to prove in this tournament here. Just, you know, doing the best I can,” Williams said. “Obviously I’m here for one reason.”

Williams started the tournament with difficult assignments in the first two rounds, but also got through those — against Belinda Bencic, with a career-high ranking of 7, and Lucie Safarova, a French Open finalist in 2015.

“She makes the court feel very, very small,” Gibbs said. “I was definitely feeling a lot of tension from early on in the match and it was showing in my serve and my forehand. I was catching the net a lot — the net felt 10 feet high today.”

Williams has set that kind of tone. She will next play No. 16 Barbora Strycova, who beat No. 21 Caroline Garcia 6-2, 7-5.

Ekaterina Makarova led by a set and 4-0 but needed three sets and almost three hours to finally beat WTA Finals champion Dominika Cibulkova 6-2, 6-7 (3), 6-3.

“An amazing fight,” Makarova said of her first win over sixth-seeded Cibulkova, the 2014 finalist at Melbourne Park. “I got, to be honest, a bit tight at 4-0 in the second set. But I’m still here.”

She’ll now take on last year’s semifinalist Johanna Konta in a rematch of their fourth-round encounter here last year.

“We played fourth round last year and we had an incredibly close one,” Konta said after her 6-3, 6-1 win over former No. 1-ranked Caroline Wozniacki. “I’m ready for a battle and it will be nothing short of that.”

Mirjana Lucic-Baroni continued her unlikely run with a 3-6, 6-2, 6-3 win over Maria Sakkari, and so did American qualifier Jennifer Brady.

Before this week, the 34-year-old Lucic-Baroni hadn’t won a match at Melbourne Park since her debut at the Australian Open in 1998. The 19-year gap in between match wins at a Grand Slam tournament broke the record set by Kimiko Date-Krumm, who went 17 years between match wins at Wimbledon.

Lucic-Baroni reached the semifinals of Wimbledon in 1999 as a 17-year-old and captured the Australian Open doubles title a year before that with Martina Hingis.

She next plays Brady, ranked No. 116, who had never played in the main draw of a major before she qualified for this week.

The 21-year-old American had a 7-6 (4), 6-2 win over 14th-seeded Elena Vesnina on Show Court 2, and is making the most of the occasion.

By saving five match points before rallying to beat Heather Watson in the second round, Brady effectively doubled her number of career wins.

On the men’s side, No. 8 Dominic Thiem beat Benoit Paire 6-1, 4-6, 6-4, 6-4 to set up a fourth-round match against No. 11 David Goffin, who ended Ivo Karlovic’s run 6-3, 6-2, 6-4.

The 37-year-old Karlovic’s win in the first round set an endurance record — the 84 games in the win over Horacio Zeballos, which ended 22-20 in the fifth, was an Open-era mark for the tournament.