Garcia looked untouchable in the first set and for much of the second, blasting 30 winners and breaking Pliskova's serve three times en route to the 6-1, 7-6 (2) victory.
"We'll see what happens; we have plenty of time in this transfer window and a couple of others as well. Time will tell," commented the forward, who added "the decision is in Real Madrid's hands."
The victory sends Garcia into the third round, equaling her best US Open result after finishing at that stage every year from 2016 to 2018.
Fourth seed Naomi Osaka of Japan booked her place in the third round with a comfortable 6-1, 6-2 win over Italy's Camila Giorgi.
"I was looking to take the jersey on stage six anyway so I'll go in with the same tactic - try to win the stage and see what happens."
"So you have to make her in trouble. That's what I like and it was a great challenge for me today. I did well in this challenge and I can take the happiness for it, and now I'm after another one."
In the second minute after kick-off, Rondon scored the opener with his left foot. Rondon extended the lead for Dalian in the 29th minute, as he assisted Marek Hamsik to slot home.
"These are needless deaths. Needless. We should be similar to most countries on the planet, and yet, we are an embarrassment, and a tragic embarrassment," Lurie added.
Flamengo netted twice in quick succession after the restart: first with a stunning first-time effort from playmaker Everton Ribeiro and then with a cool Arrascaeta finish after a counterattack.
Valter, 22, broke free during the final few kilometers and the peloton was unable to catch him.
Members of the US women's team filed a lawsuit against their federation in March because of alleged discrimination over wages. A federal judge ruled against the players, who have since lodged an appeal.