But Halep never looked comfortable, forced to rush her shots as Aiava fended off three break points to take a commanding 5-2 lead. "I'm stronger physically. I have a different look to my game".
In 2016, she lost in the second round to qualifier Naomi Osaka.
In-form Svitolina last week won the Brisbane International after picking up five WTA Tour titles a year ago, more than any other woman.
She returned in April and, because of her slide down the rankings, needed some wild-card entries to enter tournaments.
The worry for Jo is the way she ended past year when she really struggled.
"The depth in women's tennis, I really do believe in the last few years, has gotten so strong", she added.
There were all kinds of comebacks on Tuesday.
No 2 Caroline Wozniacki, who hasn't won a major and last appeared in a Grand Slam final in 2014, is on the bottom half of the draw with Williams and has French Open champion Jelena Ostapenko and last year's Australian semifinalist CoCo Vandeweghe in her quarter. Konta beat Madison Brengle 6-3, 6-1, the 10th loss in 11 first-round matches for American women.
The 19-time major champion has been met on court after previous wins by tennis greats Laver, John McEnroe and Jim Courier.
As usual, the 36-year-old Federer stayed classy. Nadal was one match away from meeting Cilic at last year's Wimbledon quarterfinals, but he lost in the fourth round to Gilles Muller. This time, he has four-time champion Andre Agassi in his corner. I think he would say "this is the start of the year and it's all about building blocks". "You're never flawless. There's always things you can work on".
Ninth seed Stan Wawrinka had a tough time of things against world number 136 Ricardas Berankis, eventually prevailing 6-3 6-4 2-6 7-6 (2).
Stephens made a stellar run to the U.S. Open title after missing several months with an injured left foot.
Britain's world No. 9 Johanna Konta could figure despite a stuttering start to the season.
Aiava, who qualified for the tournament through a wildcard playoff last month, showed why Australia is so excited about her emerging talent in a 73-minute opening set featuring six breaks of serve. She will open against unseeded German Maria Tatjana tomorrow. "I'm just going to enjoy that, see where it takes me".
Sloane Stephens and Jelena Ostapenko did it previous year. "My coach and team always said, 'Only go to tournaments when you are prepared to go all the way.' I can compete - but I don't want to just compete, I want to do far better than that and to do so, I will need a little more time".
Texas airports scrap 100s of flights as icy temperatures hit
Temperatures will fall through the night to below freezing before sunrise on Tuesday , with a frigid high of 29 degrees expected. As Texas braces itself for Winter Storm Inga, TxDOT continues pre-treating roads in anticipation of freezing rain and ice.
Windows 10 free upgrade: Today's your last chance to get it
Essentially, it's dead; for the average consumer, Windows 8 .1 will remain forever unchanged, with no new features or bug fixes. Microsoft originally warned, however, that that loophole would only remain open until 31 December 2017 , then close forever.
Reliance Jio now offering up to Rs 700 as cashback
Under the revised offering, if you make a recharge of Rs 398 and above, you will be eligible for a cashback of up to Rs 700. Subscribers can avail total cashback of up to Rs 700 in two ways- Jio tariff plan recharge and digital wallets recharge.
Sony Announces Two New PS4 Pro Versions
Available previously in a bundle, Sony is making the Glacier White PS4 Pro available as a standalone console for the first time. World PS4 Pro bundle will allow you to seek and slay ferocious beasts across a vast, ever-changing environment.