I have played a lot of tournaments, been in really big moments, and I think just learning from every experience, being in another final, semifinal or quarterfinal.
Now Nadal has to face Georgia's Nikoloz Basilashvili in the round 16.
It was the first set he had taken off Nadal.
"My personal feeling is that I am going to be at 100% for the next match", explained Nadal.
Khachanov, however, showed why he is considered one of the game's rising stars, hitting 66 winners and 22 aces before succumbing to the World number one.
When play resumed, a focused Nadal went to work, holding serve and then breaking again to get the match back on level terms.
Nadal, 32, was a set and a break down before fighting back to win 5-7 7-5 7-6 (9-7) 7-6 (7-3). For me, the most important thing is have the right tempo when I am playing. "A lot of bad things were going through my mind as everyone could see". The fate of the third set decided a dramatic tie-break - Khachanov battled back from 3:6, however, the fifth attempt Nadal still managed to take the lead. With the set looking like it may go the distance it was the American who struck, leading 5-4 she broke her opponent once again to seal victory. He held one set point two games later but netted a backhand and that was to prove his final chance.
"I gave everything I had".
Gunfire heard on broadcast of Del Mar race
The racetrack, at Del Mar Fairgrounds, is located about 21 miles north of downtown San Diego along the Pacific coast. The shooting at the Del Mar racetrack took place as a concert by the rapper Ice Cube was scheduled to start soon.
"At this stage, it's a matter of one, two points, and today I just need to cut down my unforced errors", Azarenka told reporters.
Khachanov had "big respect" to Rafa because he's such a great fighter. I'm just happy about my performance.
The 22-year-old Belgian has now completed a full set of career-best showings at each Grand Slam tournament in 2018. "I just think from the tournament side, if they (are) expecting the showers, I think it might be better to just close the roof right from the beginning".
South Africa's Kevin Anderson, who was runner-up to Nadal past year, also outlasted Canadian teenager Denis Shapovalov 4-6, 6-3, 6-4, 4-6, 6-4 as the roof on the new Louis Armstrong Stadium was closed for the first time.
Anderson, the fifth seed and runner-up to Novak Djokovic at Wimbledon, next faces ninth-seeded Austrian Dominic Thiem, who didn't have the luxury of a roof in a 3-6, 6-3, 7-6 (7/5), 6-4 victory over American Taylor Fritz on Grandstand.
Verdasco lasted two hours and 59 minutes at Arthur Ashe Stadium before he eventually succumbed 7-5 7-6 (8) 6-3 as the clock ticked past midnight at Flushing Meadows.
She stunned the sport a year ago by winning her first Grand Slam after missing 11 months because of a foot injury, then she all but crashed from the whiplash. "I would be home doing a bunch of different things and being successful at those things, but I want to do this", she said.
"That's why I think the match was great".