The teams are due to meet at Estadio Azteca in Mexico City on September 30, however health concerns and possible quarantine measures have cast doubt over the fixture.
"I played pretty aggressively from the first ball, and that's pretty necessary against her because she's a great player who can hit a lot of great angles," Mertens said. "I tried to step into the court, and thankfully my first serve was working, so that was a big advantage."
He earned icon status among River fans after scoring the decisive goal in his team's extra-time victory over rivals Boca Juniors in the 2018 Copa Libertadores final.
"A second test will be carried out within 72 hours and then another every five days as long as they remain in the tournament," he added.
Mbappe scored for Les Bleus in their 1-0 win over Sweden on Saturday, but will now be absent for Tuesday's clash against Croatia at Stade de France, which is a rematch of the 2018 FIFA World Cup final.
PARIS, Sept. 7 (Xinhua) -- All players participating in this year's French Open will be housed in two assigned hotels to reduce the risk of COVID-19, and a limit of 1,500 fans per day will be allowed to enter Roland Garros, as organizers unveiled health protocols on Monday.
Dubi also emphasized the importance of the Olympic legacy. "The Games cannot be about only a great event for 17 days. Society in general and everywhere demand that the Games bring something before what we could call pre-legacy. And something after the Games should be envisaged, not within seven years of difficult preparation and 17 days of delivery, but how this spirit of seven plus seventeen can contribute then to another 20 years in the community."
The other match on Friday saw Shenzhen Jiazhaoye held Shanghai Shenhua to a 0-0 draw.
"I wanted to go, and I was in my right to do so, because my contract said I was free. I wanted to go because I was thinking about being happy in my last years in football," he commented.
The 25-year-old equalized with the last kick of the match after Rodinei Almeida brought down Elber Pimentel with a rash challenge.
Then in the third set, Williams was rarely troubled by her rival en route to victory.