https://www.gamespot.com/articles/next-dragon-ball-fighterz-open-beta-coming-soon-af/1100-6456157/

A second open beta for Dragon Ball FighterZ is coming soon, publisher Bandai Namco announced today. This second round of public testing will start on January 17 at 9 PM PT and wrap up at the same time on January 18, running for a period of 24 hours.

The first Dragon Ball FighterZ open beta took place last weekend on PlayStation 4 and Xbox One. It ran into some network issues that couldn't be resolved quickly enough. As such, Bandai Namco announced that a second round of testing would be held at a later date, which we now know is the 24-hour period coming up later this week.