The 21-year-old was hit with a big dinner tab by his fellow Americans ahead of the Australian Open. Now, he's into the third round for the first time.

“I had to put my head down," the 21-year-old says about his self-described “delusional” early aspirations for success after college.

The 21-year-old American qualifier is chasing his first second-week appearance at a Grand Slam at Roland Garros.