In a round-of-16 meeting between two players that love the dirt, Delbonis' best might not be enough for the 18-year-old rising star in Rio.

The Italian captured a 6-2, 7-5 victory over Federico Delbonis.

For a spot in the semifinals, the Chilean will face Federico Coria.

Playing for a cause much bigger than himself, Nick Kyrgios could quickly become the feel-good story of the Australian Open.

Playing at home, the 22-year-old German faces Filip Krajinovic next.

Zverev will face off against Federico Delbonis at his home tournament in Hamburg, but coach Ivan Lendl will not be on the sideline.

"Credit to Federico, he stepped in. He was the one controlling the pace. I backed up."