Taking on the character of Ron Burgundy from his "Anchorman" films, the actor stole the show from interviewer and tennis great John McEnroe - as a somewhat nervous Federer looked on. I remember the days when we had four days of 40 degrees in a row a few years back.
Keys missed last year's Australian Open after undergoing surgery to fix her injured left wrist.
Federer, who next faces the Frenchman Richard Gasquet, said: "I knew he was going to go for his shots, it's a question of protecting your own serve as well as you can, then try to get a break. We both struggled", he said.
One of the worst years for heat at the Open was 2014, when many players were in trouble.
Sandgren had never won a match at a major event before this week, but has now beaten a three-time grand slam victor and will meet Maximilian Marterer - who ousted Fernando Verdasco in five sets - in round three.
Ferrell also revealed that he was considering playing the role of Bobby Riggs in a film about the famous "Battle of the Sexes" tennis match between Riggs and Billie Jean King in 1973, but that a competing project headlined by Steve Carrell had already started filming. Obviously before you get anything to be voted on the board, it has to go through council.
New Zealand complete 5-0 whitewash despite Pakistan's lower-order resistance
It gave his innings greater urgency and he brought up his century off 125 balls, including 10 fours and a six. In his first match since Boxing Day, Matt Henry was all over Pakistan's top-order at the Basin Reserve.
"It was tough conditions, brutal, especially the first 90 minutes", he said.
He said players had no real right to feel aggrieved at being lower priority than Federer.
"I only had surgery five months ago", said Wawrinka, who still has a visible scar running down his left knee and hadn't played since Wimbledon. The 2014 champion, seeded ninth, only chose to play in Melbourne on the eve of the tournament and was well below his best as he lost 6-2 6-1 6-4 to Tennys Sandgren of the USA.
Top seed Simona Halep rebounded from 2-5 down in the first set and an ankle injury to get past Australian wildcard Destanee Aiava 7-6 (5), 6-1.
Australian Open tournament director Craig Tiley has reportedly outlined plans to boost prize money at the opening Grand Slam of the year from $55 million to $100 million over the next five years. "I got to the point where I was so exhausted, I just told myself to swing and move".
There was a shock in the women's event earlier in the day with British number one Johanna Konta, who reached the semi-finals of last year's tournament, losing to world number 123 Bernarda Pera of the United States 6-4, 7-5.