"It's a huge deal for me, and something that if I don't ever get another accomplishment, I can at least hang my hat on this one", said Sandgren, who has earned his first two career major victories in the tournament's initial two rounds.
However, the numbers did not tell the full story as both players battled extreme heat in Melbourne, the mercury rising to nearly 108 degrees Fahrenheit at times on Rod Laver Arena, conditions they were critical of post-match.
"I thank him from the bottom of my heart", Djokovic said of Agassi, himself a four-time Open champion. "I'm happy I dodged some questions there".
Among those in trouble was Gael Monfils, with fears for his health in his mid-afternoon match against Djokovic.
"I tried to reset and focus on the next match", Bencic said. Djokovic tweaked his service motion while recovering from an injured right elbow, and used it to good effect in a 6-1, 6-2, 6-4 win over Donald Young.
"It was tough conditions, brutal, especially the first 90 minutes", he said.
"I wouldn't have minded playing during the day - I hope I survive under those conditions too", he said. It was pretty hot. "I think I'm way ahead of what I should be, that's for sure".
Defending champion Roger Federer dazzled under the Australian Open lights to waltz through to the second round with a straight sets win over Aljaz Bedene today. Sometimes we put our body at risk. If you're in the draw, you give yourself a chance.
Twelve-time Grand Slam victor Djokovic has been out of action for six months with an elbow injury, but he too looked the goods in his 6-1, 6-2, 6-4 demolition of American Donald Young.
"But to get organised all ourselves, it's not always easy because everybody has different schedules".
But he won five titles previous year and picked up wins against Federer and Djokovic, who he is on track to meet in the fourth round at Melbourne Park. I really came without thinking I will be able to play the first match.
"I think it's probably the biggest asset".
Thanks to this tennis court chat, Anchorman fans can now add the phrase "silky gazelle" to their quotable vocabulary.
Russian drawcard Sharapova was on Rod Laver Arena early and avoided the worst of the conditions as she showed why she should be again taken seriously in dismantling 14th seed Anastasija Sevastova 6-1, 7-6 (7/4).