MELBOURNE, Australia - A rampaging Maria Sharapova doled out a second consecutive double-bagel win at the Australian Open on Wednesday, hammering Japan's Misaki Doi 6-0 6-0 to storm into the third round of the year's first grand slam.

Second seed Sharapova opened her campaign on Monday with the same scoreline against fellow Russian Olga Puchkova and completed 92nd-ranked Doi's humiliation in 47 minutes.

Doi, raising ironic cheers from the crowd at Hisense Arena with every point she won late in the contest, surrendered the match by slamming a shot into the net to hand Sharapova a virtual walkover.

Sharapova will next play Venus Williams in the third round as she bids for a fifth grand slam and second at Melbourne Park. Williams defeated Alize Cornet 6-3, 6-3 on Wednesday.

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Stosur knocked out of home slam early, again

Australia's Samantha Stosur blew a 5-2 lead in the final set to continue her dismal run in her home grand slam, losing 6-4 1-6 7-5 to China's Zheng Jie on Wednesday.

Stosur, US Open champion in 2011, was serving for the match before her nerves seemed to get the better of her, allowing Zheng to claw her way back and reel off five successive games to clinch a place in the third round against Julia Goerges.

Jim Rogash / Getty Images The Week in Sports Pictures The nation grieved for those hurt, killed and affected by the Boston Marathon bombings. After one of the suspects was caught on Friday — following a day-long lockdown and manhunt — sports returned to Boston over the weekend.

The 28-year-old Stosur had minor ankle surgery late last year and lost in the opening round of both the Brisbane and Sydney tournaments before the start of the Australian Open.

Stosur, who lost to Zheng in the first round at Sydney last week, handed victory to her Chinese opponent when she double faulted on match point. Stosur has never advanced past the fourth round at Melbourne Park.

Radwanska, Kerber advance to third round

Agnieszka Radwanska continued her 2013 unbeaten streak, extending it to 11 matches, with a comfortable 6-3 6-3 second round victory over Romania's Irina-Camelia Begu at the Australian Open on Wednesday.

The world number four, who won the Auckland and Sydney tournaments before the grand slam began and is yet to drop a set this year, will now meet either Ksenia Pervak or Heather Watson in the third round.

Fifth seed Angelique Kerber also advanced to the third round when she managed to overcome a feisty Lucie Hradecka 6-3 6-1 in 69 minutes.

Kerber, like Radwanska, dropped the first service game of the match before clicking into gear in the second set and sealing a clash against either American wild card Madison Keys or Austria's Tamira Paszek with an ace.