"Not easy to come back after a lot of months, especially against a player playing super aggressive on every point", said the 2009 Australian champion, who showed no sign of any injury worries.
Nadal looked in impressive form in his first competitive match since the US Open in September.
Nadal had promised to unveil a remodelled, improved serve at the first Grand Slam of the year and the new action was going smoothly until he served for the match at 5-3 in the third set only for Duckworth to break to love. After losing two service games in the match, Nadal was pleased with it.
The Spanish left-hander beat No. 238th-ranked James Duckworth 6-4, 6-3, 7-5, his 15th win in 17 matches against wild cards at Grand Slam tournaments.
Nadal moved on with a 6-4, 6-3, 7-5 win over Australian wild-card entry James Duckworth, his first match back at Rod Laver Arena since he had to retire in his quarterfinal match in the tournament previous year.
Sharapova, the champion in 2008, takes on unseeded Harriet Dart in her first match since withdrawing because of a thigh injury in Shenzhen.
"I'm still working through some painful days".
"When I get broken was not because of the serve", said the second seed who dished up just a single double fault. "I felt solid with the second".
Lil Uzi Vert says he's 'done with music'
Lil Uzi Vert announced on Instagram that he's "done with music ". "I WANNA WAKE UP IN 2013", read the post's message. In 2014, the Philadelphia rapper signed to Atlantic Records, having previously self-released two earlier projects.
Eleventh seed Aryna Sabalenka, widely tipped as a potential future champion, also safely negotiated round one on a hot day.
It seemed Boulter wasn't told, fist-pumping and walking to the net at 7/4 before being reminded of the new rule.
United States number one John Isner was sent crashing out of the first round of the competition by compatriot Reilly Opelka 7-6 (4) 7-6 (6) 6-7 (4) 7-6 (5) in a battle of two of the game's tallest players.
A full house at Melbourne Arena cheered raucously for Murray.
Berdych was the 2010 runner-up at Wimbledon and he twice has been a semifinalist at the Australian Open.
Spain's 22nd seed Roberto Bautista Agut is the man who could draw the curtain on Murray's time Down Under, where he has been a five-time finalist.
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