But with each passing match, the world number three looks to be building momentum.
He took just over two hours to see off 15th-ranked Anderson 7-5 6-1 6-4 on the Rod Laver Arena.
The Spaniard oozed confidence after his victory as he bids for his second Australian Open title.
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Five-time grand slam winner Sharapova conceded as much when asked to reflect on the upcoming clash Tuesday.
“It was a really tough three setter. She’s been playing incredibly well — confident aggressive tennis. I have a tough match ahead of me,” she said,
