Donald, who turned pro at 14, had a Nike contract at 15 and played in his first US Open at 16.
Organisers suspend matches due to extreme temperatures even as Azarenka, Nadal and Federer all advance; Del Potro exits
Murray simply flicked a switch and won 23 consecutive points in a blistering finish.
Azarenka said she was thankful she did not have to play in the heat of the day.
After comprehensive win, Nadal will next play either 25th seed Gael Monfils or American Jack Sock.
Roger Federer ended the 107-minute lesson when he clinched the tie-break 7-4.
Wozniacki moves into the Australian Open third round after beating McHale 6-0, 1-6, 6-2.
Organisers lost more than four hours of play on the outer courts due to extreme heat.
After a tough win, Sharapova now plays 25th seed Alize Cornet in the third round.
The defeat of left-handed Divij denied India an all-win day at Australian Open.
After fighting cancer, Britain’s Ross Hutchins makes his way into second round.
Novak, Serena win in straight sets, but heat takes toll as Dodig becomes 10th player to retire.
The bet is placed before legitimate betting agencies are able to close off wagering.
Mannarino looked to be struggling in temperatures in excess of 37 degree during last two sets.
Novak Djokovic next plays Russian 30th seed Dmitry Tursunov.
Serena Williams won almost 90 percent of her first serve points.
Murray swept into the second round with a 6-1, 6-1, 6-3 rout of Japan’s Go Soeda.
The unseeded Indian showed a lot of fighting spirit before going down 4-6 4-6 6-7 (2) to World No. 27.
With temperatures soaring, Open heats up on Day Two with enthralling five-setters and excruciating pull-outs.
Sharapova was made to work hard for her passage into the second round.
Nadal will play Australian wildcard Thanasi Kokkinakis in the second round.
Del Potro steadied in the second set and cruised to victory in just over three hours.
Murray will next play the winner of Vincent Millot or another qualifier in Wayne Odesnik.
The 29-year-old sat with a bag of ice on his head and had plenty more stuffed into a towel around his neck.
Federer next faces the winner of Czech Radek Stepanek and Slovakian Blaz Kavcic.
In pictures: Mumbai's first restaurant-on-wheels opens today