The two-time Grand Slam winner committed just seven unforced errors throughout the one-sided encounter and broke her opponent's serve six times.
"I think I played a really good match. I was very aggressive. I knew from last year I had to change something, so I really wanted to be better than last year and definitely, I was today," said the world No. 2.
The 2020-21 season will be played behind closed doors in a bubble, with all participants undergoing isolated management to ensure their safety.
Liverpool's defense was overrun for the entire 90 minutes at Villa Park with Ollie Watkins scoring a first half hat-trick, Jack Grealish scoring twice and John McGinn and, new arrival, Ross Barkley also getting in on the act.
AC Milan continued its good forms as the Rossoneri beat Spezia 3-0, including a Rafael Leao brace.
The French midfielder fired Marseille in front in the 16th minute from Florian Thauvin's pass, squeezing a shot between goalkeeper Anthony Lopes and the foot of the post for his first goal of the season.
Halep didn't play at her best, especially when facing a firing teenager who combined her drop shot and backhand so perfectly throughout the match.
It looked like Bayern was on the way to an easy victory but Hertha Berlin turned up the intensity and halved the deficit only seven minutes later when Cordoba headed home Matheus Cunha's free kick.
Napoli was banned from traveling by local health authorities, after Piotr Zielinski and Eljif Elmas tested positive for COVID-19.
Edmond Tapsoba (R) of Leverkusen vies with Silas Wamangituka of Stuttgart during a German Bundesliga match between VfB Stuttgart and Bayer 04 Leverkusen in Stuttgart, Germany, Oct. 3, 2020. (Photo by Philippe Ruiz/Xinhua)
In addition, the quality of the 10 member teams means there are no easy games for anyone; the region boasts four national sides in FIFA's current top 10 and seven in the top 25.