Heat rules come into play at the Australian Open

MELBOURNE, Australia (AP) — Play was suspended on outside courts and briefly halted on undercover arenas in the mid-afternoon Saturday under the extreme heat rules at the Australian Open.

Defending champion Jannik Sinner was down a break in the third set of his third-round match against Eliot Spizzirri and struggling with cramping when play was stopped for several minutes to allow the roof on Rod Laver Arena to be closed.

A match on John Cain Arena was also suspended while the stadium roof was closed. All matches on outside courts were stopped when the tournament's heat index hit 5 and were expected to be on hold for at least three hours.

The temperature was around 35 degrees Celsius (95 Fahrenheit) when the extreme heat policy was invoked, and the forecast is for searing temperatures up to 40 degrees Celsius (104 Fahrenheit).

An earlier start than usual on Day 7 and hot weather were no worries for defending champion Madison Keys and her fellow American Jessica Pegula in their morning matches. The ninth-seeded Keys beat Karolina Pliskova 6-3, 6-3 in the opening match on Rod Laver Arena on Saturday, while sixth-seeded Pegula defeated Oksana Selekhmeteva 6-3, 6-2 in the first match at Margaret Court Arena.

Next up for the two Americans is a fourth-round encounter against each other.

“I served well, and overall I give myself a full pat on the back for that,” Keys said of her win. “It gives yourself a boost when you can find your best tennis, trust your game and try to do the right things.”

Pegula said she didn’t mind the hotter temperatures — “being a Floridian I was ready for it.”

Keys said she expects a tough match against Pegula in the fourth round.

“Jess is such a great player, consistently doing well in every match she plays,” Keys said. “She is in every single match. It also makes it hard being friends.”

There was an all-American encounter on Saturday as well — fourth-seeded Amanda Anisimova beat Peyton Stearns 6-1, 6-4 to advance to the Round of 16.

Podcast pals

Keys and Pegula, along with several other WTA players, do a podcast called “The Player’s Box” which chronicles everyday life on tour.

“ I think we have to do (one) before the match, so we’ll see how that goes,” Keys said, smiling.

Among the Americans who featured in early matches Saturday, Spizzirri had the toughest assignment. The 24-year-old Spizzirri, who spent part of his off-day Friday playing table tennis at a communal table in Garden Court at Melbourne Park, played two-time defending champion and second-seeded Sinner.

Djokovic, Osaka in night session

The night session at Rod Laver Arena featured 10-time champion Novak Djokovic as he continued his quest for a record 25th Grand Slam singles title. Djokovic plays Botic van de Zandschulp in the first of the evening matches.

The concluding match on the main court could have the capacity crowd guessing what fashion statement Naomi Osaka might make in her third-round encounter with Australian qualifier Maddison Inglis.

Osaka, who has two Australian Open titles among her four majors, walked onto the court wearing a wide-brim hat, a veil and holding a white parasol for her first-round match. For her second, Osaka didn’t bother with the couture hat, veil and parasol but was still wearing a jellyfish-inspired dress and matching warmup jacket.