Every time Gauff was down set point, she went on the attack and when the teenager finally snatched the first set, she let out a huge roar that sounded like a mixture of relief and delight.
Gauff was cruising towards the finish line when she raced ahead 4-1 and then 5-1, before the nerves kicked in and she suddenly became a little more passive. Krunic took advantage to get all the way back to 5-4.
“I was nervous going in, and I think it showed,” Gauff said. “She played really well, great tennis. I didn't play my best today, but I'm happy that I was able to fight through it.
“(In) the first set, there were many moments I could have given up but I didn't. I'm happy with the result today.
“The first rounds are probably some of the hardest matches in the tournament, just because you're probably the most nervous.”