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.
"It was a heavy finish. It was maybe the most easy stage I ever did in a cycling race because there was no breakaway, not a high pace at all, but then the last hour was really hectic with the wind," Van Aert said.
Irish rider Sam Bennett expanded his lead over Peter Sagan to 12 points in the race for the green jersey, while Benoit Cosnefroy kept his polka dot jersey after a stage with few points to clinch. Enditem
Luis Enrique's team left it late and flabbergasted the hosts when Moreno flicked on a cross before Gaya poked home with a turn shot from very close range in the closing seconds of injury-time.
"I rode my tempo and gave it all to create a gap big enough to win."
After the restart, Germany got a perfect start as Werner broke the deadlock on 51 minutes after capitalizing on Robin Gosens' square pass into the penalty area.
In the 48th minute, the Venezuelan striker assisted Swedish winger Sam Larsson to stretch the lead for Dalian.
"It was a delight to wear yellow. Hopefully I'll keep for a few more days. Let's first see how it goes tomorrow."
The organizers designed a route with a 17km climb before the finish line, which seemed like it might bring about some interesting developments on the rugged, narrow mountain road.
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.
It was a bizarre way for the Frenchman to lose the jersey which he had kept for three days after winning the stage two.