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MELBOURNE, Australia -- Maria Sharapova finished her first match of the year in 55 minutes Monday, cruising to a 6-0, 6-0 win over Olga Puchkova to start proceedings on center court at the Australian Open without showing any signs of trouble with her sore right shoulder.

The No. 2-ranked Sharapova, who lost the final to Victoria Azarenka here last year before going on to win the French Open, faced only two break points in the match, and she saved both of those in the first game.

Then she went on a 12-game roll that earned her a second "double bagel" inside a year.

Sharapova started her run to the French Open title with a 6-0, 6-0 win over Alexandra Caduntu at Roland Garros last year. But she said the score line wasn't really relevant.

"If you win 7-6 in the third, you've still won the match," said Sharapova, who later Monday launched a Twitter account, debuting with a reference to her new candy line Sugarpova with an accompanying photo.

"Your ultimate sugarmama has arrived #myfirsttweet," the post said.

Sharapova withdrew from the Brisbane International earlier this month with an injured right collarbone, saying she wanted to concentrate on being fit for the season's first major. She skipped the tournament last year, as well, before going on to reach the Australian Open final.

"After a couple of close games and a few break points, I certainly started to concentrate a bit better," she said. "I didn't want to concentrate on the fact I hadn't played a lot of matches. I just wanted to focus on what was ahead of me and really be aggressive.

"It was one of those matches where I didn't try to worry about her too much."

Sharapova has a potential third-round match against Venus Williams, who needed just an hour for her opening 6-1, 6-0 win over Galina Voskoboeva of Kazakhstan.

William West/AFP/GettyImagesVenus Williams won her opening match at the Australian Open, setting up a potential third-round match against Maria Sharapova.

No. 4 Agnieszka Radwanska won the last nine games in her opening 7-5, 6-0 win over Australian wild-card entry Bojana Bobusic. And 2011 U.S. Open champion Samantha Stosur beat Kai-Chen Chang of Taiwan 7-6 (3), 6-3 to end a run of five losses on home soil.

Sixth-seeded Li Na, who lost the Australian Open final before winning the 2011 French Open, had a 6-1, 6-3 win over Sesil Karatantcheva of Kazakhstan, and No. 18 Julia Goerges of Germany and No. 27 Sorana Cirstea of Romania also advanced.

Former French Open champion and 13th-seeded Ana Ivanovic completed women's play for the day with a 6-2, 6-1 win over Melinda Czink of Hungary.

Former No. 1-ranked Jelena Jankovic beat Sweden's Johanna Larsson 6-2, 6-2.

Williams played with power and determination and took command of the match early with a steady stream of winners and powerful serves.

She skipped last year's Australian Open because of illness and was warmly welcomed with applause as she entered the court. Williams had the biggest jump of any of the top players in 2012, moving from outside the top 100 to finish the year at No. 24.

The announcer told the crowd as Williams, who has won seven major titles, was warming up on court: "She's back and fiery."

Williams said she was happy with the match statistics, particularly her serve, so early in the season.

"I don't think my opponent quite got the hang of … you know, it's hard to play the first match in a major, first thing of the year, and that can be a lot of pressure," Williams said. "I did my best to just close it out."

Her younger sister, Serena, was sitting in the crowd with coach Patrick Mouratoglou. Serena is the strong favorite to win the Australian Open, heading into the tournament with 35 wins in her past 36 matches including titles at Wimbledon, the Olympics and the U.S. Open.

No. 3-ranked Serena is in the top half of the draw with defending champion Azarenka, and the pair won't start until Tuesday.

Information from The Associated Press was used in this report.