Stephens lost to Daria Kasatkina of Russia 6-4, 6-3, and fell to 2-4 in matches this year.
Saturday marked the first time in more than a decade that matches at the tournament were postponed a day.
"I just completely lost rhythm, everything", a candid Djokovic told press.
"I just struggled also a little bit with the health the last couple of weeks".
"The rest, I said I will decide after Miami to then decide what I will play if I do play the clay court after that". "But at the same time, I just didn't feel good at all", he added.
The only thing rarer than a raindrop in the Southern California desert might be a Roger Federer early-round loss, and thankfully for fans, the weekend brought only one of those anomalies.
"And even though you don't have pain, you're still thinking about it, because it's been something that I have been feeling and dragging for over two years".
The former world No. 1 is making a cautious return to the ATP Tour after stopping his 2017 season following Wimbledon, due to a right elbow injury.
Chung, who made the final four at Melbourne Park in January, broke three times throughout the contest to prevail after one hour, 24 minutes. The other victory came in Rotterdam.
"I think it's only (a matter of) time to get where he deserves to be", said Del Potro. Krajinovic, no stranger to the big stage, had the finest moment of his career last year when he reached the final of the Paris Masters, coming to within a set of the title.
"But it's not easy to deal with this kind of frustrations after injuries or when you always be the favorite to win a tournament, you come here and you lose in first round".
Federer barely raised a sweat as he advanced on Monday, the evergreen 36-year-old blitzing Filip Krajinovic 6-2, 6-1.
Federer returned to stadium court on Sunday afternoon and needed an hour to finish off his second round victory 6-3, 7-6 (8-6). The most recent meeting was in the 2015 Monte Carlo Masters, a match won in straight sets.
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