The "Eisernen" made a perfect start on home soil as Christopher Lenz tested Mainz goalkeeper Robin Zentner in the early stages, before Max Kruse nodded home his debut goal after Sheraldo Becker's pinpoint cross to the far post in the 13th minute.
The South American zone's 2022 World Cup qualifiers had been scheduled to begin in late March but were postponed because of the coronavirus pandemic.
"I knew she was going to be aggressive. I knew that she's playing this way. Today it worked really well for her," Halep added. "At this level, nobody surprises anybody anymore because everyone has a big level and it depends on the day that you are."
"But now after the restart and our return to swimming, we can show the spirit of the Chinese people and our swimming fans to other fans across the country, and even to the whole world," said Zhu.
Nadal will face Sebastian Korda, the son of 1998 Australian Open winner Petr Korda, in the next round. The American youngster secured his first appearance in a Grand Slam round of 16 by beating fellow qualifier Pedro Martinez 6-4, 6-3, 6-1 to advance.
The defending champions, who had lost their first two games of the new season, have now bounced back with four consecutive wins to move up to second place.
Several players are still only 16 or 17 years old but have become valuable members of the team since the start of the season. With only one victory in three rounds, the young and ambitious Bratislava is currently in fourth position.
Also absent will be representatives from Oriente Petrolero, due to bickering between club officials and the Bolivian Football Federation (FBF).
His initial spell at the helm ended after the 1990 World Cup, however, Tabarez returned in 2006 and immediately turned the team's fortunes around.
The 26-year-old Kenyan was far behind her world record of 2:14:04 that she set in Chicago last year, but met no challenge after 30 kilometers.
Things got worse for Ole Gunnar Solskjaer's team as Anthony Martial was sent off for lashing out at Erik Lamela, and Harry Kane and Son made it 4-1 before halftime.