HIGHLIGHTS-Tennis-Australian Open day one

The championships were delayed by three weeks to allow all players arriving from abroad to quarantine for two weeks. U.S. Open champion Naomi Osaka played Anastasia Pavlyuchenkova in the opening match on the main showcourt, Rod Laver Arena.

Highlights of day one of the Australian Open tennis championships at Melbourne Park on Monday. Times local (GMT +11): 1350 WAWRINKA DOWNS SOUSA

Men's 17th seed Stan Wawrinka beat Portugal's Pedro Sousa 6-3 6-2 6-4. The Swiss sent down seven aces and hit 35 winners while Sousa made 31 unforced errors, five more than his opponent. 1346 SERENA EASES INTO SECOND ROUND

Serena Williams eased past Germany's Laura Siegemund 6-1 6-1 to reach the second round. The American hit 16 winners as she wrapped up the one-sided contest in just under an hour, and was eager to wind up her post-match interview as quickly as possible to watch the end of the Super Bowl. "I gotta go! I gotta go! You're taking too long," she said in on court interview.

1309 RAONIC EASES PAST CORIA Canada's Milos Raonic moved into round two with a 6-3 6-3 6-2 win over Argentine Federico Coria.

Raonic, who is seeded 14th, struck 51 winners compared to just nine from his opponent and wrapped up the match in 95 minutes. 1300 VENUS BEATS FLIPKENS IN STRAIGHT SETS

Venus Williams beat Belgium's Kirsten Flipkens 7-5 6-2 to reach the second round in front of about 200 fans on Margaret Court Arena. Flipkens made 30 unforced errors compared to just 13 by Williams, who also won more than 80% of her first-serve points.

READ MORE: Australian Open order of play on Monday

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Penpix of the top women's contenders at the Australian Open 1224 U.S. OPEN CHAMPION NAOMI OSAKA THROUGH

Third seed Naomi Osaka was the first player through to the second round after a 6-1 6-2 thrashing of Anastasia Pavlyuchenkova. "I'm just really happy to see people in the stands. It's been a bit lonely in New York, so thank you guys," Osaka told a small crowd at Rod Laver Arena.

1109 PLAY GETS UNDERWAY AT 109TH AUSTRALIAN OPEN Play got underway on time under leaden skies at Melbourne Park with the temperature hovering around the 17 degrees Celsius mark.

There was one locally acquired case of COVID-19 reported in the state of Victoria on Monday, a worker at a quarantine hotel not associated with the tennis. The championships were delayed by three weeks to allow all players arriving from abroad to quarantine for two weeks.

U.S. Open champion Naomi Osaka played Anastasia Pavlyuchenkova in the opening match on the main showcourt, Rod Laver Arena.