Mackenzie McDonald knew he was ready to turn pro after his junior year at UCLA. He had never played anyone ranked better than No. 69 before facing the third-seeded Dimitrov on Wednesday.
Trailing 4-2 the alarm bells were sounding, but Dimitrov turned things around to regain control.
"Really the game wasn't there today". He had just won the NCAA singles and doubles titles and believed he was ready to take the next step. That was my fighting spirit.
"I think it's very important".
That seemed to be a theme of Day 3.
"If I was him, I would sit down in a room somewhere and put some deep thought into whom might bring to the table something that I may feel I need that I don't have".
Nadal, the 2017 runner-up, didn't risk any close calls. A strong hold followed from Dimitrov, who saved two breakpoints in the final game before taking the match. "He beat me at the US Open so I knew what to expect and what I had to do". At least the game was a little bit better than the previous match.
"That was insane", Wozniacki said.
He broke a hot-and-bothered Rublev in the seventh game of the fourth set and, despite a slight stutter when serving for victory, he chased down a Rublev volley to ram home a forehand victor.More news: Tim Cook Says iPhone Users Can Turn Off Throttling -- Soon
More news: US Government shutsdown as senate fails to agree on new budget
More news: IOC reduces pool of Russian athletes eligible to compete at Olympics
"At 5-1, 40-15 ... she served a great serve down the T (and) it was just slightly out".
The Croatian sixth seed was too strong for the 45th-ranked American, winning 7-6 (7/4), 6-3, 7-6 (7/4) in 2hr 29min in a night match on Hisense Arena.
Dimitrov has had off days during both his second and third round clashes at the first Grand Slam of the year but he has managed to stay put and dish out those hard victories - something that is the mark of a champion.
He is the only British man in the main draw after Andy Murray's injury withdrawal and will play either Croatia's 38- year-old Ivo Karlovic or Italian Andreas Seppi next.
Another Ukrainian, Kateryna Bondarenko, beat 15th-seeded Anastasia Pavlyuchenkova 6-2, 6-3 and will next play No. 19 Magdalena Rybarikova.
But on Friday she gave her most assured performance of the tournament so far, cruising past Kiki Bertens of the Netherlands 6-4, 6-3 in an hour and 26 minutes.
"I was soaking it all in". I was happy that everything went my way.