Germany took the reins and pressed forward whereas Spain looked shocked and unable to respond.
"Kyle played a fantastic first set," added Djokovic. "He didn't do much wrong, he served very well and was aggressive from the back of the court. Usually his forehand is a weapon, but his backhand, especially in the first set, was very strong, very solid."
Alaphilippe had led Yates by four seconds when the race was finished and looked to have retained the yellow jersey, but television footage showed him taking a bottle from a Deceuninck-Quick Step team support member with 17.8km to go - under the rules of cycling's world governing body UCI, riders are not allowed to take on food or drink in the final 20km of a race.
Nationwide demonstrations against what activists have described as police brutality and systemic racial inequality have broken out over the past few months, particularly after police killed George Floyd and shot Jacob Blake. Enditem
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.
The win meant Qingdao continue to lead the overall standings, although second-placed Ruichang Biyuan also cruised to a victory, beating second from the bottom team Anhui Souyu 4-1 later in the day.
It was a bizarre way for the Frenchman to lose the jersey which he had kept for three days after winning the stage two.
The 23-year-old, who has previously been linked to interest from Spanish giants, Real Madrid and FC Barcelona, has agreed a contract until June 2025. He will travel to Manchester to join his new teammates after the Netherlands' UEFA Nations League game against Italy on September 7.
The pandemic forced clubs to develop creative concepts to stay in close contact with fans and partners worldwide. "Virtual tours run by several clubs have been a great success," he added.
Spain responded with a big chance at the other end of the pitch as a misplaced return pass from Emre Can to goalkeeper Kevin Trapp allowed Rodrigo Moreno to intercept the loose ball. However, Trapp denied Moreno after blocking the shot in the nick of time in the 14th minute.
"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.